Here is the part numbers and GM's pricing for the different C6 models.

Master

LS9/MH3 -- 24251645

MM6/MZ6 -- 12568371 -- 2006-2009 -- $133

Slave

LS9 -- 24237569 -- $237

MM6/MZ6 -- 242376634 -- 2005-2009

Flywheel

LS9 -- 12598613 -- $257

LS3/LS7 -- 12571611 -- 2006-2009 -- $331

LS3/A6 -- 12582437 flex plate with hub -- $254

Clutch

LS9 -- 24237568 -- $625

LS3/LS7 -- 24248985

LS9 has a stronger crank to handle the ZR1 HP/Tq so it's flyhweel has nine bolts to 6 bolts for other models.

LS9 also has a new designed slave that now allows just the bearing be replaced if need be where older design you had to replace the whole slave.

ZR1 also has a larger diameter driveshaft and drivetube.
The end of driveshaft though going through clutch and pilot bearing is the same for all models.

Difference of LS9 and other C6 flywheels

It might be workable to modify LS7 to fit other C5/C6 cranks.