I finally found a MAXX in stock locally, so I snatched it up - and I'm kind of regretting it.
So far the only things the MAXX has on the nexus is battery life and wifi strength.
I thought the nexus had bad signal/data performance, but I can now chalk that up to it just being my area. The MAXX is in no way shape or form better in data/reception than the Nexus. The MAXX usually shows more bars, but the Nexus would consistently get faster speeds. A 2-3mbit connection on the MAXX is about 3-5 on the Nexus (speedtest app) What's weird though, is the ping (speedtest app) on the MAXX is a LOT better than the Nexus. I'd get maybe 60-90 ping on the MAXX while on the Nexus I'd get 150-350 consistently. Not really sure what that means. I know what ping means, but why would the MAXX outperform in ping and be worse in speed?
Wifi on the MAXX is better - I consistently get 30mbit at home, while on the Nexus I'd get 12-15mbit standing right next to the router. Not a big deal though, I'm not downloading huge movies and games on my Nexus, so 30mbit is a little overkill. You can't tell the difference in browsing between the 2.
Screen on the Nexus is obviously better - but the brightness/saturation and stuff on them is pretty close. The Nexus just has higher resolution so of course everything is prettier.
Build quality - I guess the MAXX has better materials, etc - but I like the ergonomics of the Nexus better, as the MAXX is wider, and I don't like that as much.
The kicker is ICS though. I'm TOTALLY missing it. I know MAXX will get ICS soon, but it probably won't be the same stripped down customizable version that's on the Nexus (correct me if I'm wrong?).
I had no prior experience to ICS or to Motorola's system before this, and I can tell you ICS is a bajillion times easier to use. While I'm browsing around in the MAXX sometimes I wonder what Motorola was thinking.
However, after all this I will probably keep the MAXX. My wife is due for an upgrade soon, and I will probably end up using it on the S3 when it's released. She likes the MAXX better because of the battery, so since this phone will be hers in a couple months, the MAXX stays and the Nexus goes - for now =)