Are all 4 pot Brembos the same?

[jonrandom]

As title, there are loads of 4 pot Brembo's for different cars, subaru, evo, bmw, lcr, alfa etc but are they all of the same standard? Are some 4 pot Brembo's any worse or better than other 4 pot Brembo's?

I know the wont all fit. 

[scarr89]

I think there are different models of 4 pot brembos. iirc people say that the ones on the porsche aren't good for some reason.

Also I think there are different sizes of pistons across the range.

[jonrandom]

The porsche front ones are good its just that people use the rear callipers for the front, thats where you run into problems as like you say they have smaller piston sizes so nowhere near the stopping power compare to fronts.