wilwood/tci question

[turbosonoma]

so i order a tci pro touring front end and request the biggest brakes possible, that is 14" with the smaller 9.44" sl6r radial mount caliper, then i ordered brakes for the back to match the front, my options are 13 or 14", since the price difference is minimal i went for 14's, these come with a completely different 4 piston caliper that has the three round impressions on each side so youd think it is a 6 piston and its huge compared to the front one , like 1.5" longer and wider and bigger the other way to. so i cant exactly put completely looking bigger calipers on the back than the front, so what got messed up here? initially i told tci i wanted bigger front calipers as the sl6r looks very small against the 14" rotor, but they said thats the only one they can do, so must i downgrade rear brakes now or???