Google Nest Learning Thermostat 3rd Gen vs Honeywell TH6320ZW2003 Lyric T6 Pro: Smart Learning Against Z-Wave Control

The choice between the Google Nest Learning Thermostat 3rd Gen and the Honeywell TH6320ZW2003 Lyric T6 Pro comes down to how a home is run. One thermostat learns a household’s schedule and adjusts itself, while the other is a Z-Wave device built to be commanded by a smart-home hub. This comparison lays out the differences that actually change a buying decision, then names the household each one suits.

Google Nest Learning Thermostat 3rd Gen

Product: Google Nest Learning Thermostat – 3rd Gen – Programmable Smart Thermostat for Home – Compatible with Alexa (Stainless Steel)
Type: Programmable smart thermostat with learning behavior
Finish: Stainless Steel
Voice Control: Compatible with Alexa
Brand Ecosystem: Google Nest
Price Tier: Premium

The Nest 3rd Gen is the polished, self-programming option. Its defining feature is the learning behavior named on the box: rather than asking a household to build a weekly schedule by hand, it observes the temperatures that get chosen and the times they get changed, then starts repeating those patterns on its own. The stainless steel housing and round display give it a presence on the wall that most thermostats do not attempt.

Alexa compatibility extends control to voice, so temperature changes do not require walking to the hallway. The premium price tier buys that combination of automatic scheduling, voice control and a finish meant to be looked at. Buyers who want a thermostat to disappear into the background and handle itself will find the Nest aimed squarely at them.

Trade-off: The learning behavior needs time and repetition before it becomes useful, and a household with an irregular schedule may never settle into a pattern the thermostat can absorb.

Check the current price on Amazon

Honeywell TH6320ZW2003 Lyric T6 Pro

Product: Honeywell TH6320ZW2003 LYRIC T6 PRO Z-WAVE THERMOSTAT
Type: Z-Wave smart thermostat
Series: Lyric T6 Pro
Connectivity: Z-Wave
Brand: Honeywell
Price Tier: Mid-range

The Lyric T6 Pro is a different kind of device. Z-Wave is the detail that matters: this thermostat is designed to join a Z-Wave network and take orders from a hub, which makes it a component in a wider smart-home system rather than a standalone brain. Homes already running Z-Wave lighting, locks and sensors can bring heating and cooling into the same app and the same automation routines.

That integration is the entire argument for this model. A schedule built in the hub can move the thermostat alongside everything else, and one interface covers the whole house. The Honeywell name carries weight with buyers who have owned its thermostats before, and the mid-range positioning reflects a device that trades built-in intelligence for network membership.

Trade-off: Z-Wave control depends on a compatible hub being present and configured, so a household without one gets far less from this thermostat than the price suggests.

Check the current price on Amazon

Side-by-Side Comparison

Feature	Google Nest Learning Thermostat 3rd Gen	Honeywell TH6320ZW2003 Lyric T6 Pro
Type	Programmable smart thermostat	Z-Wave smart thermostat
Scheduling	Learns patterns automatically	Built through a Z-Wave hub
Voice Control	Compatible with Alexa	Not stated in the product name
Finish	Stainless Steel	Standard thermostat housing
Hub Required	No	Yes, for Z-Wave features
Ecosystem	Google Nest	Z-Wave network
Best Use	Self-managing homes	Existing Z-Wave smart homes
Price Tier	Premium	Mid-range

How the Two Thermostats Differ

Intelligence and Scheduling

The Nest carries its own intelligence. Learning behavior means the thermostat builds a schedule from observed habits, and the household does not have to sit down with an app and plot out a week of temperatures. For buyers who have never programmed a thermostat and never want to, that is the whole point of the product.

The Honeywell pushes scheduling outward to the hub. Its Z-Wave connection lets a smart-home controller decide when the thermostat runs, which is more flexible in one sense and more demanding in another: someone has to build those routines. A household that enjoys automation will see this as an advantage. One that does not will see it as homework.

Verdict: The Nest wins on out-of-the-box automation; the Honeywell wins on programmable flexibility for buyers who will use it.

Ecosystem and Compatibility

Alexa compatibility on the Nest means voice control without extra hardware beyond an Echo device. The thermostat also belongs to the Google Nest family, which matters to households already using Nest cameras or doorbells and want one app for the lot.

The Lyric T6 Pro speaks Z-Wave, a protocol with a long history in home automation and broad support across hubs. That is a real strength for a house already built on Z-Wave, and a real obstacle for a house that is not. The two products are not competing for the same installation so much as for the same wall.

Verdict: Neither is more compatible in the abstract; each is compatible with a different kind of home.

Design and Presence

Stainless steel and a round display make the Nest a visible object, one designed to be noticed. That suits a hallway or living area where the thermostat is on show and the household wants it to look deliberate.

The Lyric T6 Pro reads as a working thermostat rather than a design piece. Buyers choosing it are generally choosing it for what it does on a network, not for how it looks doing it. Aesthetics are not the deciding dimension here, but they are a genuine difference.

Verdict: The Nest takes this dimension comfortably.

Installation and Setup

The Nest is a self-contained install: mount it, connect it, let it learn. The absence of a required hub removes a step and a failure point, and the learning behavior means setup is largely a matter of living normally for a week or two.

The Honeywell adds a layer. Z-Wave pairing, hub configuration and automation building all sit between the box and a working schedule. Buyers already running a Z-Wave network will find that familiar; buyers starting from nothing will find it a project.

Verdict: The Nest is the simpler path for a standalone installation.

Cost and Value

The Nest sits in the premium tier, and the price reflects the learning behavior, the finish and the Alexa integration. The Lyric T6 Pro sits below it, which makes sense for a device that depends on a hub the buyer may already own.

Value depends entirely on what is already in the house. A Z-Wave household gets a capable thermostat at a lower entry point. A household without a hub has to count the hub in the cost of the Honeywell, and that arithmetic often closes the gap.

Verdict: The Honeywell is better value only where the network already exists.

Which Should You Buy?

Choose the Google Nest Learning Thermostat 3rd Gen if: the household wants a thermostat that programs itself, uses Alexa for voice control, and does not want to maintain a smart-home hub to keep the heating and cooling running. It also suits buyers who care how the device looks on the wall.

Choose the Honeywell TH6320ZW2003 Lyric T6 Pro if: a Z-Wave hub is already running the home, and the thermostat should join the same automations as the lights and locks. It also suits buyers who prefer to build their own schedules rather than hand that job to the device.

Buyers with no hub and no intention of buying one should not choose the Honeywell. Buyers who want granular manual control and dislike the idea of a thermostat making its own decisions should think twice about the Nest.

FAQ

1. Does the Nest Learning Thermostat 3rd Gen need a hub?
   No. It works as a standalone thermostat, and Alexa compatibility handles voice control without a separate smart-home controller.

2. Does the Honeywell Lyric T6 Pro work without Z-Wave?
   The Z-Wave connection is the reason to buy it. Without a compatible hub, most of what makes this model worth its price is unavailable.

3. Which thermostat is easier to install?
   The Nest, because it does not require pairing to a network or building automations in a hub before it becomes useful.

4. Can the Nest learn an irregular schedule?
   Learning depends on repetition. Households with consistent routines give it the most to work with; highly irregular ones may need to adjust temperatures manually more often.

5. Is the Honeywell a good fit for a house already using Z-Wave lights?
   Yes. That is precisely the scenario the Lyric T6 Pro is built for, and the thermostat slots into routines that already exist.

6. Which one offers voice control?
   The Nest lists Alexa compatibility. The Honeywell’s product name does not state voice support, so buyers should not assume it.

7. Which is the better pick for a rental or a simple setup?
   The Nest, since it needs no hub and no network configuration to start working.

Bottom Line

For most households, the Google Nest Learning Thermostat 3rd Gen is the easier recommendation: it programs itself, works with Alexa, and needs no hub to earn its keep. The Honeywell TH6320ZW2003 Lyric T6 Pro is the right answer only in a home already running Z-Wave, where joining the existing network turns it into a genuinely smart component rather than an isolated thermostat.