I wear a 10 or a 10.5 and have feet thinner than most would think humanly possible.
I tried on the 44 and it fit perfectly. Everyone I know has gotten their size and been happy, except my brother that wears a 10.5/11 found the 44 to fit better than the 45.
If you can just go to a store and try them on. How sweet is the deal that you have found?