You serious dude? Ron Artest is a flat out improvement over Trevor Ariza, without question. Having Artest to hold it down on the defensive end is going to help Kobe Bryant out so much, because hes not going to have to work nearly as hard on D anymore. Aslong as Ron stays to a team approach and doesnt chuck 3's (which he will still be allowed to do as much as Ariza did, so he should be satisfied) Artest is most definitely going to provide more for your team than Ariza.. I dont even think its very close.
PS: Ron Artest's numbers last season: 17.1 PPG, 5.2 RPG, 3.3 APG, 1.5 SPG, 40% FG, 78% FT, 35% 3PT
Ariza: 8.9 PPG, 4.3 RPG, 1.8 APG, 1.7 SPG, 46% FG, 71% FT, 31% 3PT
Ariza averaged about 10 minutes less.. but I dont really see how Ariza was "better" than Ron Artest by any means. And he definitely aint a better defender, we both know that.
/end high rant.