I've seen the inversion method done with identical boats, with non-raised tramps.

Haven't seen anyone try that with a H16. The hulls are wider than the tramp frames, not sure if that would be a factor.

EDIT: One major factor with inverting a H16 would be the curvature of the front beam. If nothing else, that might be the deal-breaker.

Rightside-up makes more sense (to me), especially for different model boats. The crossbeams won't be in the same place, so that might cause an issue when tying them together (if inverted). When rightside-up, they don't need to match up, as the tiedowns will just angle over to where they need to go. Again, watch for chafing.

Mike