​disc brakes is the main difference . I think they are different forks too

The parva or subway1 please - not much of a price difference - just confused between the two - any pointers?

Slightly off topic but you folks seem to know your stuff - any opinion on how this or more likely the Carrera Crossfire 1 or 2 would compare to my Giant CRS 3.0? It's in need of a bit of tlc and I'm trying to decide whether to fix it up or replace it. Ta.