How do you find the battery life?
It's definitely better than the SD, but not as great as I thought based on the reviews. It's hard to do an apples with apples, but I would say maybe 30 - 40% max better. I can comfortably go a full day wihout a charge, but often had a dead SD by the time I got home if I was at work, and then out at night. That's based on a general light mixture of texting, the odd call or two, and mostly internet browsing - not much youtube or gaming. I still need to do some battery testing and tweak things to see how good I can get it. This is all based on out-of-the-box stuff.
Take it with a pinch of salt, but it's definitely better. I haven't upgraded to the latest version of Android though, so that may improve it, although I've heard JB has caused a few issues for some people.
Is it alot faster than the SD?
I haven't noticed much difference at all. I haven't done any benchmarks, but it feels ever so slightly slower in the menus and flicking through the homes screens, but faster in browsing and videos playback. I hope that helps. The little bit of gaming I've done make me think it's slightly quicker there too, but I haven't noticed any difference at a functional level, or even enough to be 'obvious'.
Also do you notice the lower res?
Yes - one of the first things I noticed. Bothered me at first, because the SD density is pretty nice, but now I've had it for a few weeks, it doesn't really matter, and part of it is definitely to do with the glass and how fingerprints show on it. Everything is great to look at and I can't 'see' the pixels clearly or anything like that. It's just possible to notice an ever-so-slight difference in sharpness overall. Side by side, you'd say the RAZR i 'feels' the tiniest bit grainy to look at, although we're talking resolutions that the eye can only just pick up on. It's more the glass than the resolution.
As you can tell from my response, it's all much of a muchness. The battery life is definitely better, and although not as big of a difference as I'd hoped, it's still a big plus. Everything else is hardly worth talking about. What is worth saying again, is that the build quality is sooooooo much better. It's borderline SD vs iphone or HTC One. It's just a solid phone with what I'm sure is a mostly aluminium case. the buttons are metal too. And thank god - the power/lock button is really smooth and tasty to press. It's splash proof to boot. I'm pretty certain the 'carbon fiber' on the back is not carbon fiber, but some kind of study plastic or poly-carbonate coloured to look like it - still good quality plastic, if you can say such a thing. And believe it or not, the SD is distinctively bigger than the Moto all round.
If you're thinking about a bigger screen - http://techdy.com/shop/bear-pro/
If it really does have those specs, and it's not all a scam, it's a damn bargain, and modeled on probably the best phone in the world. My hands are small, so it's not for me, but it could certainly be worth a look, particularly as you're considering a bigger screen.
In my humble opinion, 4.3 - 4.5 is perfect, especially with moto's edge design. No phone should ever be made any other way. It's just awesome. Let's see what the Moto X brings!