The vamp is at a higher incline I think so there will be more pressure at the balls of your feet. I have no problems either styles but bianca is def more comfortable with the front platform
I also have both and yes, the biancas are definitely way more comfy. I'm still working on breaking my LLZs in and I agree, they're a little bit of a struggle sometimes. I think I need to do some ankle strengthening exercises!! lol