Hi
They are not that different to fly. CAA considers them as the same type for licensing and OPC/LPC/IR purposes and I can fly a N straight after a N2 and vice versa. The take off profiles are basically the same with just a variation on using the rotor beep trim.
The main difference is in what you can carry as the N has a MTOW of 4000Kg while the N2 has a MTOW of 4250Kg. In the N Sea config this usually means that a N2 gives approx 150Kg better payload as the N2 APS is about 100Kg heavier than a N.
I would always choose to fly the N2, as in my company it is better equiped in the navigation department with a RNAV2 display superimposed onto the radar.
HF