PB, nearly all of the alpine schools use Jodel D140 Mousqetaires on R-F (or similar) skis.
The D140 has an O-360 with fixed-pitch prop. Flying side-by-side in summer they have less drag and better cooling than my MX-7-180, so they climb a bit faster, but they can't land or take off quite as short. I think in winter or with little 8.50x6 tires on both, the climb rates would be about the same.
Almost all of the glacier flying in Europe seems to be on Rosti-Fernandez skis, or on Megève's improvement thereof.
There are also plenty of privately owned 150 Super Cubs on skis in the Alps, and a few Maules, though mostly 235s and at least one 420. So at a guess a MX-7-180 driver would have to pick take-off slopes with care.