I only drove my sister AA tuned 335xi and my stock M3 , it just does'nt compare , the M3 even with the lack of low end torque is so much more fun to drive and to sit in and to look at and to ear from inside and out !!
And also bigger turbo even if it's not that big mean less response , that I would'nt want , I don't know where you drive but I would not sacrafice response to have 700hp if I don't drag , ESS 625 + cat delete (+650hp) all the way for me !!
Either choice you will sure have some fun !!
