Through the decades there have been numerous articles on 10 bolt rears are better than 12 bolt, T350's are better than T400's, 2 bolt mains are better than 4 bolt, bla bla bla... Usually they come from people with 2 bolt engines, 10 bolt rears, and T350 Transmissions, LOL
There's Pro's & Con's on everything, which one is; smaller, lighter, quicker, stronger, cheaper to build, etc... Bottom line is if your making BIG POWER you want something that can hold it, and if your making low to moderate hp then you don't need the biggest & baddest. I make 649 RWHP (about 750HP at the crank) so I'll stick with my 9.9" Rear, Tremec TR6060, & 6 Bolt Mains Thank You