.
Not if the corresponding BBK is tailored to the actual car including its rear brakes
and MC. If so the total piston area (one side of each caliper) remains the same
regardless of its number of pistons.
That's the main issue with fitting Porsche Cayenne/Audi Q7, VW Touareg calipers
to a GTI, S3, R btw. - a blatant mismatch and the most obvious issue is the pedal
will therefore feel soft.
Believe me, I could write a book about it or two, but it isn't worth it in this case, just
because Shel's money is better spent on a nice dinner with his wife (or ten of them).
.