Replying to Which boot?

My shop recommended either the Head Formula 100 27.5 or S/Pro 100 26.5, The head boot has a little bit of toe room up front but I feel like if I put a footbed in there it would take up the space. The S/Pro fits my foot very tight not to the point wear it hurts, but I feels like I wouldn't be able to find a footbed cause of how clamped down on my foot the boot is, also afraid toe bang or something might happen with my toes against the end. Also I'm still growing the feet, and Ill need these for next season. Currently my boot has extreme heellift and is way too big are there some tests I can do with my foot in the boot to make sure it will work on snow/park 100%? Thanks, sorry for making it so long