I back to backed the Trophy 300 and 280 RS cup with the N before I traded in my Golf R. I was heading for a Trophy but the Renault dealer was atrocious and a 3-6 month wait for even a solid white car didn't help. If you wanted yellow or orange it was 6-9 months wait unless you wanted a full option car for near £37kas they had a couple available.
Decision time and the wife liked the i30N more than the Megane.
I didn't find the Trophy too firm but the wife was less keen especially as we'd had a Cup Chassis Megane RS 3 years ago. The RS are very track focussed and it's a shame the UK with it's rough roads can't have the normal suspension with the rest of the Trophy bits, brakes and LSD. I'm very happy with my N and no buyers remorse at all and it's great to hit the N button and have it pop and bang when you feel like it.
I think the Trophy will be back on the radar again at change time as I just have a thing for those RS Meganes.