Replying to Nordica ace of spade boot sizing?

Went to a boot fitter today and was fit into 27 dalbello krypton pro id. These felt good but i was told i could go a bit wider since my foot measured for a 100mm.

He recomended the Nordica Ace of spades, but I could not find a store in Whistler that carries them.


Ive checked backcountry and they have 26.5 27.5 28.5...in this years and last years model. But no 26,27 or 28.

I was wondering what the difference was between a 27 and a 27.5 in Nordicas AOS boot. In know the shell is the same size and I know most companies keep the liner the same size too. Anyone know ?