At the end of the day the choice is yours, but when ever I hear someone talk about skates, and they say they have their heart set on skate X, it always rings alarm bells in my head. Form my experience, it tends to not end well. Because it means someone is looking for all the reasons to buy skate X and are looking for all the reasons to not buy skate Y and are not giving the pros and cons enough of an equal measure. I'm not saying this is the case with you, because I honestly do not know, but I'm just saying be careful of getting blinded by the glitter of the new and shiny.
With that said, you can adjust the way your laces are done up to help with the stiffness of a boot, and IMHO, that is a smaller adjustment to make than trying to make a skate that's too big work. My right foot is a quarter size larger than my left, and it's quite annoying. I couldn't imagine the challenges of trying to deal with an even bigger difference in foot size.