Obviously you can not feel the Motul but with the SS lines I can defintely feel a difference in hard braking on the street. The pedal feels more firm with SS lines. You can feel and modulate the brakes better. Under normal braking and morning startup there is a more solid feel.Did you notice the improvement on the stret or track? Not doubting your impression, but I can't see normal street driving conditions causing the rubber lines to expand so much that you are able to notice the stainless steel lines' rigidity. Same with the change from stock fluid to Motul 600. However, if you see improvement when tracking the car, then I understand.