[Eee Pad Transformer Q&A, Help & Troubleshooting] wynand32:
I had a few free moments this evening and so I set the Xoom and TF side by side for a little closer of an examination. Here are some thoughts (mimicking what some others have said):

Screen: Yes, the TF's screen really is that much better than the Xoom's. Not only are viewing angles better on the TF, but colors are much more natural and pleasant. The Xoom (at least mine; there are actually two different screens being used on Xooms) is much colder (e.g., more blue). The TF's colors seem more natural to me, and much warmer. I'd be hard-pressed to give up the TF for that reason alone.

Audio: Yes, the Xoom's external speakers are indeed louder and clearer. I'm actually disappointed in the TF's speakers now that I've done some testing. Via headphones, I can't tell much of a difference, and the TF's sound is fine. It's a good thing that I'm not too concerned about audio quality, because the Xoom wins that one hands-down.

Design: This one's a toss-up. The Xoom is much smaller, particularly in landscape, but it feels heavier in the hand and the small bezel makes it easier to accidentally tap the screen. Thumb typing is a bit easier on the Xoom, but the TF just feels more natural to me. I could go either way in this category. As far as button placement and such, I think it's also a toss-up. I never found the power button so terrible on the Xoom, but the TF's placement is better. And the volume buttons on the Xoom are harder to press.

Build quality: This is a win for the Xoom--it's solid as a rock. My TF has a gap between the bezel and the screen on the left hand side, and does have a bit of creaking. The edges of the ports and such are a bit sharp as well. I don't mind the TF, but if the price was closer and build quality was the final determining factor, I'd lean toward the Xoom.

Performance: The TF seems to perform better than the Xoom. There's less lagginess, and the touch on both is equal (in my case) and so the TF just feels smoother. I haven't noticed a difference in video performance, but then I don't watch much video.

Software: Huge win for Asus. Not only are the Asus utilities actually quite nice in my book (except maybe for the ereader app), but I like what Asus has done to tweak Honeycomb just a bit. I like the on-screen buttons better, and of course the screen capture functionality is nice and should be built into Honeycomb. Of course, Asus has enabled the SD card slot, which is a plus, and they've provided more and better updates so far.

Ports and expandability: Also a huge win for the TF. Although the Xoom does have a standard miniUSB port and so can be plugged into a PC without a proprietary cable, the TF has the keyboard dock. Full SD card and two full USB ports makes the TF so much more functional. Not to mention, there's the option of trickle-charging in a real pinch, which the Xoom doesn't support at all.

Conclusion: If the price were the same and the TF didn't have the keyboard dock (and thus, of course, wasn't the "Transformer"), I'd still likely choose the TF just because the screen is SO MUCH better. I've tried using the Xoom without the TF next to it, and I can tell as I'm using it that the screen isn't up to snuff. And of course, the TF is in fact $200 less than the Xoom (and I don't need the extra 16GB), and it does have the keyboard dock. And so for me, the choice is pretty clear.