Inferno is by far the worse B&M I've ever been on. I wouldn't mind if it left - although Thorpe Park don't have much that can beat it either.
I don't think its fair to say that its the worsed B&M. I wouldn't say its the best but they are a lot worse out there.
Anyway, Inferno does have some qualities which the origanal doesn't have. For an example the drop at the start and into the tunnel. The layout is impressive (there just somthing about it that "wows!" me) I found it to be smother. Last time I went on Nemesis, It gave me a bit of a headache.
Nemesis on the other hand, does have the better theming and Atmophere. Nemmy also has some unique feathers. Like the fact its build in a massive hole in the ground. Nemmy is a little overated in my view (You gonna hate me for that :oops: ) Never the lese its still a great ride.
Its a hard one for me, their both great coaster.