The Mini Max is lighter, so it does have that going for it. People may tell you other wise but I like the way these small boats R4, they become more stable, they're considerably faster, and with the longer waterline track like a larger boat. Lets also not forget how much fun they are!
Both are great boats from reputable companies. That being said my vote would be for the Max, especially for a Gunni Gorge craft. Its lighter and rolls/packs way tighter than any Aire boat.
Aim low, they're riding ponies.