[XPERIA X1 General] tricky42:
Guess I'll throw in my 2 cents, too...

I was an iPhone user for a year and half before replacing it with an X1 6 months ago. Both have their strengths and weaknesses, and as people have already mentioned, it really comes down to what *you* are looking for in a phone.

Things I like about the X1:

- Real keyboard. While I got used to the iPhone soft keyboard and could type relatively fast on it, I never liked it. Maybe now with the 3.0 OS and system-wide landscape keyboard, I might feel differently.

- Buttons. Hang up, call, voice command, however you want to configure them.

- Form factor. Obviously very much a personal preference, but I always found the iPhone uncomfortably thin to hold. Adding any of the various cases to it just made the whole thing bulky. The X1 is almost perfect for me -- narrower and more compact, but thicker so it rests in my palm more naturally and I can get a better grip on it.

- Customization. While no phone is perfect, at least with WinMo, you can go a lot further in making it work the way you want. Icons, sounds, wallpapers, today screen, etc.

As one example of customization that's more than just eye candy, to-do lists never worked for me until I got the X1, because I'd never go out of my way to check them. Out of sight, out of mind. With the X1, I have one of the Xperia panels configured to list my upcoming appointments and tasks, as well as a couple of common shortcut icons, wifi/bluetooth/speaker toggles, clock, monthly calendar, and weather, all packed onto one screen. It's the ugliest main screen you'll ever see on a phone, but it's been unbelievably useful to me. Similarly, some people prefer to customize the standard today screen, or use SPB -- choices you don't get with the iPhone.

Oh, but in the evenings, I switch back to the much prettier Titanium today screen (I'm running WM6.5), thanks to the panels feature. :D

- Outlook and OneNote integration. A lot more complete than what iTunes does with the iPhone. Of course, I'm probably one of only a handful of people who actually use OneNote.
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Things I miss about the iPhone:

- Build quality. My X1's developed some cracks. Parts of it creak while using it. The top and bottom halves seem to have loosened up a little over time. The iPhone on the other hand was rock solid.

- Screen. Glass. Flush edges.

- Vibrate switch. So convenient. Don't even need to take the phone out of your pocket.

- UI. It's just so simple and slick. Definitely a pleasure to use.

- UI speed. I don't know if the iPhone is necessarily any faster, but it definitely has a higher framerate and smoother window animation. In WinMo, a lot of the apps draw its UI components in bits and pieces, making it feel slow, while the iPhone just hangs here and there (before sliding in the next screen with some slick animation). The 3GS, though, is definitely faster for real.

- iTunes integration. Just because I've always used iTunes for my music.

- App store. There's something to be said about having it all in one place. (On the other hand, Apple can reject apps.) Also, there are definitely some cool iPhone apps, and I'm sure a lot more on the way. (Yes, there's a whole lot of crap too, but nobody's forcing you to use them.)​

So those are my main thoughts on the X1 and iPhone. The X1 is definitely the winner for me in terms of functionality and productivity. But if those weren't my priorities, I'd probably go with the iPhone.