OK.....ATR training skipper here......
While the 72 is effectively a 'stretch' of the 42 it does handle noticeably differently in certain phases of flight. It is (obviously) larger, has more power and different aerodynamic characteristics to the 42.
The landing technique is basically to keep some power on until you get to around 10 ft on the rad alt and then close the power levers and flare considerably less than you do in a 42 (which isn't much anyway). Some of my colleagues say 'just drive it on'.
Hope this helps
aero