Artifact and Mod are different boards. Don't get me wrong, the Artifact can still do what the Mod can. But not as well. The Artifact is a noodley jib/park oriented board and the Mod Rocker is a park/ all mountain board. They both can hold their own outside of their specialties, but aren't going to be superb. Those are the stats, it's up to you to take it and decide what you like best. Ride them if you get the chance before buying them.
Im all for having fun, showing your tits and getting fucked up on a river float but it can be done without being a pig.