fr32 will be more driveable
dont go to wild for road use it will make it undrivable in traffic and come mot time your hc's (unburnt fuel) will be sky high and idle will be poor
not to mention econimy
cams just alow an engine to make more power at diffrent bands of revs so a cam with a higher rev rating will have poorer power in the lower revs
its always easyer to make more power gains at higher rpms much harder at lower ones
think of it as robbing peter to pay paul