hey there,
i just went to genting and sunway last month! what i feel is that Sunway doesnt really appeal to adults as their rides are not as adrenaline pumping as they claim to be... Genting is not bad for their rides but their main attraction is still their casinos. A visit to Chinatown which is a 30 min and 1 hr taxi ride from Sunway and Genting respectively should not be missed . There , you can find great food and bargain for cheap fake stuff!
Hope this helps!