my mates s15 is alot more of a sports car to drive as opposed to the skyline, has a completly different feel from sitting in the low down seats to the power delivery. My rb tends to be alot more responsive in low revs before 3.5krpm but the s15 comes on power so much harder it seems yet the skyline walks away at the end. both cars have very simular power. having driven both i am torn between the two. handling wise you can tell the s15 is definetly a drifters car, The skyline (coilovers) has excellent turn in, a little tail happy but holds on as far as it can. my opinion