What? 100hp rotax develops the same power as a 100hp continental unless one of the manufactures is telling tails.
In the training environment the rotax burns less full in fact some 6 liters an hour less.
As for build quality when did you ever hear of a top end overall on a rotax or a dropped value. Common on the o-200.
Given the choice I would always fly behind the rotax. Cheaper and more reliable.
Thanks for the comments on the P92 I will have to check one out.