[Samsung Epic 4G Touch] Hanson68:
Coming from the Evo 4G:

Battery life (stock) - Better, but nothing mind blowing. I have Exchange Active Sync set up for work, and I assume that's a real battery killer. I get another hour, maybe two over the Evo, but it's still not an all day phone.

GPS performance - I haven't had any problem with locking, but I did have one peculiar experience where the Nav program constantly had me on a different street and kept remapping the route. A reboot may have worked, but I closed the Nav program and followed the regular map. I'll have to keep an eye on this,

Overall speed (I will replace touchwiz with Launcher Pro or ADW Launcher) - Soooo much faster. Pretty much every function on the ET is 2-5 times faster than the Evo. Even little things like checking email or making a phone call fly on the ET. It just snaps from screen to screen in a way that makes the Evo look really slow. I assumed I would install LauncherPro, but I've kept TW because it's not getting in my way. And it's really nice not having Sense crash on me 5 times a day. I could reboot the ET in the time it took Sense to recover from the frequent crashes. Since Sense has no program dock (just the phone app), I couldn't do anything while it was restarting.

Signal stability - 4G is leagues better on the ET. It locks faster, it's more stable, and I can get it in places the Evo couldn't lock. It will sleep when used, which means it's not eating up the battery simply by being on. And it doesn't slow down the phone like it did on the Evo. 3G is about the same, I don't really see it as that much worse, and ditto for wifi.

Call/audio quality both speaker and mic - The speaker is louder on the ET, and the call quality is leaps and bounds better. I can make clear calls in places where the Evo would crackle so much it was unintelligible. It's not just a little better -- it's like night and day.

The camera is great, and the camera program is amazing. You can make shortcuts to your most used features. In addition to flash, you can toggle three other features like exposure or speed using a shortcut button. And there is no contest with video recording -- the ET is grossly superior.

I don't miss Sense at all. I never used most of the widgets because of battery issues, and the TW dialer is better than the Sense dialer (I love the swipe left or right to call or text) and it's easier to dial contacts who have a cell and home number. And I like that I can dock two programs of my choice as opposed to none in Sense. Also, TW has never crashed on me.

The App Drawer takes a little getting used to. It scrolls side to side like iOS, and it's slower than flicking to scroll up and down. But it does segregate your most recently installed apps which makes them easier to find. There were a lot of times on my Evo when I couldn't remember the name of the app I had installed two minutes ago. Plus, you can set up folders in the App Drawer to better organize it.

The thinness and lightness has to be experienced to appreciate. The Evo feels like a tiny brick in my hands now. Reading Kindle in bed is less fatiguing with the ET, and with the volume rocker on the other side, flipping pages using volume keys and holding it with my left hand makes it even more ergonomic.

There's really nothing substantial that I miss from my Evo -- there's barely anything minor that I miss. The few things (the security lock timeout is ludicrously implemented and the lockscreen itself is awkward to use) have been remedied by apps.