like i said, might be just the setup
i previously liked lucas trw pads and recommended them to a mate
he put them on both his r32 gtr with stock brake setup with slotted rotors and also his mr2 with adaptor brackets to use larger discs
on the mr2 it pulled up amazing, and on the gtr not so much!
there are so many factors involved from my experiences with the 4 cars mentioned
that being said, i had project mu pads in my sprinter with stock jap brake setup and they were awesome street pad