I fly a Schweizer which, like the Bell, has no governer. Got it wrong a couple of times but my instructor was there to correct me; and now it is not an issue or a problem so, no, it is not more difficult without a governer and, given you would not know any different, I doubt whether you would find it any harder
Personally, out of the two choices you have, I'd go for the Bell - there are threads galore about the merits of different helicopters in which to train - you'll just have to make a judgment.
Cheers
Whirlygig