We may earn a commission from links on this page.The Fitbit brand has long been defined by fitness trackers with tiny screens, yet it's been three years since it released a new one. Now that the Fitbit Edge has been announced (and pre-orders have opened), longtime Fitbit users are probably wondering how it compares to the last Fitbit release with a screen, the Charge 6. The design is the first clear difference: The Edge fits in perfectly between the screenless Fitbit Air and the smooth, curved screen of the Pixel Watch. It runs on the same operating system as the Fitbit Air, which is slightly different from the OS that runs on Pixel watches. Like other Fitbits, the Edge pairs with both iPhones and Android devices. Now, let's look at what Google has added since the Charge 6—and what it took away. Google Fitbit Edge - Activity Tracker - Pyrite/Olive - Small & Large Band $179.99 at Amazon Get Deal Get Deal $179.99 at Amazon The Fitbit Edge has a real side buttonI just unboxed the Fitbit Edge that Google sent me to review, and can confirm: There is a physical button on the right side of the casing. It makes an audible click when you press it in, even when the device is turned off. The Charge 6 has a "button" that is just a haptic nub—squeeze it, and if you're lucky it might recognize your touch and buzz in response. (Sadly, I found it often didn't work.) The Fitbit Edge has an altimeter and an allegedly better GPS chipsetThe altimeter is a brand-new bit of hardware in the Fitbit Edge. You have to go back to the Charge 4 to find a Fitbit tracker with an altimeter. This is the sensor that tells you your altitude and enables a measurement of how many "floors" you have climbed throughout the day. It also allows for more accurate tracking of hills on your hikes and hilly runs. The Charge 6 and the Edge both have GPS capabilities, allowing the device to know where you are in the world, even if you left your phone at home. (The Fitbit Air, by contrast. does not have its own GPS and has to pester your phone to find out where you are and how fast you're running.) The Charge 6's GPS has some serious flaws, the main one being that tightening the wristband too much could strain the GPS antenna, leading to comically distorted maps, as you can see from my testing. Google says the Fitbit Edge has better GPS hardware. I believe them, but mainly because it would be hard for it to be worse. The Fitbit Edge does not have Google Pay or NFC capabilitiesThis is the biggest downgrade: With the Charge 6, you could set up Google Wallet and be able to tap your Fitbit to pay for things at stores. That's a convenient feature if you like to run or walk without your phone and still be able to buy a drink at a convenience store. But the Fitbit Edge dropped this capability, probably to make room for other internal components. If you loved Google Pay on your older Fitbit, you'll miss it if you upgrade to the Edge.The Fitbit Edge will be able to play music from any app, not just Youtube MusicThe Charge 6's music player is one of the most frustrating things about it. The music controls only work for Youtube Music. That's a premium service, meaning you need to pay a monthly subscription fee just to be able to control music playing on your phone, and it has to be a subscription to Youtube Music—Spotify or Apple Music users are out of luck.Fortunately, that's been fixed in the Fitbit Edge. Google says it will be able to control whatever is playing on your phone (like pretty much every other watch in existence) rather than relying on a specific app. Google Maps directions are unsupported on the Edge—but "coming soon"At launch, the Fitbit Edge doesn't support Google Maps directions—but Google's spec sheets say it's "coming soon." To be fair, Google Maps directions were never particularly useful. They lived in their own little app, and only gave you turn-by-turn directions, not a map view showing where you are. In the long run, this isn't likely a difference that matters, since Google plans to bring this feature to the Edge. But if you enjoy it on your Charge 6, you should know it's not going to be available right away on the Fitbit Edge.