Haha, I first joined CF just as Nemesis Inferno opened back in 2003, and this was the very first topic I posted. How cute.
The age-old comparison, but it'll never get boring.
Nemesis Inferno wins hands down, the intensity, speed and smoothness (especially smoothness) seem much more apparent on Nemesis Inferno. Don't get me wrong, Nemesis has a very intense helix and the wingovers are taken at a nice pace, but everything else just seems either too rough or too forceless. Some points are too slow (turnaround) and some points are too fast (Zero-G) to be appreciated. It's time to let go of Nemesis, she's a pensioner already.