Yep, the only difference between v2 and v1 is lack of SAS controllers! It is beyond me the reasoning behind the release of the V2 being so similar.... and it kinda seems like it's hard to find buying online.
From my understanding, both the deluxe versions support 24GB ram, it's the P6T that supports just 12GB. The P6T Deluxe had a BIOS update to allow the 24GB

If you're using that much RAM, you're insane!
The OC palm version is the same board, just an included hand held "remote" if you will used for overclocking.. worth the extra 40 bucks? I personally didn't think so.
There is also a WS revolution workstation version..
Good luck, and feel free to ask any questions about the P6T deluxe, I will answer them to the best of my ability which hopefully meets your standards