I'm a novice skier, aiming for backcountry eventually. I'm buying my first pair of boots. The bootfitter recommended the Tecnica Cochise 100 and it felt pretty good demoing it for two days. There was a bit of toe room (toes didn't touch the front while standing unflexed) but it didn't seem to affect my skiing much (mostly blue runs) at this stage. Buckles were all at intermediate stops. The fitter said he himself sizes up a bit when touring since he's hiking in them and kicking in steps, and a bit of room helps. The boot was at 1 size higher than my measured mondo size; my actual size is basically impossible to find in this boot (24.5, can't find any stores online or off stocking it).
Another bootfitter at the same shop recommended the Lange XC 120, which is wider and larger volume, but is alpine-only. It was at my actual mondo size and definitely felt more conforming to my foot shape. Toes slightly curled while standing, opening up when flexed. Good volume and just wide enough for my toes. It felt precise but I haven't had a chance to demo them.
What should I do? Sacrifice AT compatibility for a better downhill boot, and get separate AT boots later? Or compromise with one boot that does resort and backcountry? How much am I losing if I get a less precise fit with the Cochise 100?