Horses for courses, a lot depends on your ability to pick up what you are shown by the instructor, and if you have a good instructor and you can pick it up pretty well asap, then realy both would pan out about the same.
However if you master the R22 and I mean master it well, then you would find no difficulty in transferring to another heli later on and then you would see just how hard and twitchy the R22 is.
But treat all helicopters with respect, they will snarl at you and bite your backside so quickly that you will only realise something is wrong at about the last point of recovery! never fly into clouds and never try to do somthing that you aint been shown, once you pass your test, then you'll start to learn how to fly and find your way round
Fly safe, land safer!!
Vfr
PeterR-B