I'd be surprised if MIN FL didn't take into account the worst reasonably likely conditions.
I'm guessing the change from MIN Alt to MIN FL is due to the surrounding airspace transition altitude/flight level, and, if necessary, an additional flight level will have been added to the MIN FL to account for any reasonably expected variations in conditions.
Just a guess. I don't sit at the pointy end, nor do I operate in the Alps. I prefer much closer to sea level!