i drove my mate's 1995 model 180sx the other day with blactop sr20 which is the same engine used in the s14s aswell. it had catback exhaust and pod. honestly, straight line speed wise it felt alot like my parents' VT 3.8 v6. definately not as quick as i thought it would be.....i haven't driven a r32 so can't say which would be quicker...
factory times say both do around 15secs for 1/4 but keep in mind the r32 is a few years older than the s14s. personaly the series2 s14 has one of my favourite front ends, very mean lookin. but the rest of the car is average. and i hate sr20s.
RB20 engine/exhaust note has to be one of the sweetest sounding ever