Generally, the more cylinders, the smoother the bike is at low revs. I'd much rather be on an inline four CBR600 in traffic than a parallel-twin CB500- the CBR runs from idle all the way to the redline smoothly. Twins tend to be much more "lumpy" and often require clutch slip, especially when crawling along, especially performance twins which tend to have lighter flywheels. My TL1000S is a great laugh, but murder in traffic!
Also don't worry about putting too much throttle on and wheelying unexpectedly. It doesn't happen at sensible revs, even on a 1000cc litrebike. Most sportbikes are tuned to make all their power at the top end, so the torque curve is generally flat below 6000rpm, which is where you'll spend most of your time riding. On a sports 600 you can whack the throttle wide open at 2000 rpm and it'll make more noise but not a lot else.
Also don't worry about putting too much throttle on and wheelying unexpectedly. It doesn't happen at sensible revs, even on a 1000cc litrebike. Most sportbikes are tuned to make all their power at the top end, so the torque curve is generally flat below 6000rpm, which is where you'll spend most of your time riding. On a sports 600 you can whack the throttle wide open at 2000 rpm and it'll make more noise but not a lot else.