a) Build quality - amazing.
No argument well not much of one. I do not think it is that big a deal.
b) Battery life - incredible
Couldnt argue if i tried
c) Bluetooth - worked very well out of the box for me (much unlike the GS3)
No issues with my SGS3 at all. I havent used it much but it seems to work well.
In my car, the SG3 pairs well, but then the microphone function goes out when making. receiving calls, forcing me to switch sound to the handset (therefore it's completely useless). I can unpair and pair again, and it works for a while, but always goes back to this behavior. I've never had that problem with any other phone.
d) Smart Actions - love the feature, everyone should implement something like this. Techtiles are close, but not as cool.
No experience
e) Messaging app - i still text a lot, and preferred the simple approach that motorola/google took in this, as opposed to the stupid bubble messaging app in Touchwiz.
Its an Android, you can change this any variety of ways. I am on a non-stock ROM and I do not have that issue.
I know that I can change this, and it is one of the advantages of Android. However, 95% of people don't root/change their phones, and while there probably are other messaging apps available, my preference is one over the other.
f) Email - the email client was a lot better in Motorola's phone.
K-9 is still the best email app. Never really played with MOTOs but the stock Gmail app is good as well. The TW version does suck.
g) World connectivity - need that, I travel overseas a lot. Verizon promised this for the GS3, but I don't have it or see it yet.
Easily remedied. Instructions over on XDA.
Again - it's more than anyone *should* have to deal with, given that it was promised.
I am still saying you cannot go wrong with either phone. I just think this list is a bit weak since all of it can be changed