Registered Forum User
Big Twin
Posts: 1,513
Join Date: Mar 2004
Location: South Beds
Mood: Black and grey (and a bit of red)
I haven't ridden the 998 so cannot really answer your question.
However, I did change the brakes on my SPS to P34 4 pad calipers with cast iron disks - a great improvement on standard, could hardly ask for more.
I would say go for the SPS but then I would, wouldn't I.