If you plan on drag racing you would want the steel flywheel to keep the inertia going for the launch and between shifts, if you're just street and road racing then the aluminum.
The 10 spline spec clutch ratings are
Stage 1:335, Stage 2:395, 2+:440, 3:500, 3+:565, 4:500, 5:645
The 26 spline ratings:
1:510, 2:599, 2+:669, 3:760, 3+:850, 4:760, 5:1008
Now these are at the flywheel ratings so if you are shooting for high 500's at the rear wheels you'll need something that is rated at least 15-20% higher due to drivetrain losses. So if you go for 580rwtq, you would want something rated to handle at least 696 tq at the flywheel.