Anyone tried 993 C2 rear calipers on a 968?

I'm thinking about getting big reds upfront and wondered if anyone has tried 993 C2 calipers in the rear.  From my understanding it would use the same break pads as our stock rear caliper, but has 30mm & 34mm pistons compared to 28mm & 30mm pistons on the factory 968 rear calipers.

I know some people just leave the rear caliper alone and go with a different brake bias valve, but would simply adding a caliper with larger pistons be another viable option?

Thanks, Dan