I don't know

The only difference I can see in the two light switches are;

Original says 40-250w, new one says 60-250w
Original has a "C" (could be a "G") marked where the black wire went, new one has a funy, wavy arrow design where the black wire goes. Both have L1 and L2 next to each other.

Both have a brass thing saying the chassis must be earthed to it, but the wiring in the wall has the two yellow/green earth wires disappearing up into the cable spur...