they are the SAME ecu. Hill power had my chip sent from R sport. will be here on friday. had a long chat with nick today on my wasted trip down!!
basicly the grp N ecu is best suited to JUST an induction kit and exhaust. any more mods and it wont cope aswell as is needed to. if your planning loads of mods go for a re-mappable chip.
hope this clears up a few things.