I fly both R44 and EC 120. I like autos to the ground, and find it easier with the Eurocopter - more stored energy in that heavier head.
The issue is with recoverability if things are not perfect. With the R44 you can snap the throttle open fairly late on and bring the engine in in time to convert a ground attempt to a power recovery. Can't snap open the Eurocopter throttle. Well...... You can if you don't mind the bill for the over-torque. You need time to feed the throttle back in.
So it is more a case of being certain that you have it right before closing the throttle on the EC 120 because you may not be able to use the engine to recover.