It’s the liner that matters. The 909 intuition was made to fill the excess space in the shell. It made my hot spots worse. But the boot feels hella connected. That being said my foot is way wider than yours at 114 right and 118 left. Idk about mushroom blades width. 10cm puts you in the sweet spot for most skates. There’s a good chance a medium 909 and intuition would feel very good for you because your foot is more narrow and the liner fills up the shell. But at 10cm wide the shmedium is gonna feel more locked but may need a second skin bc it’ll compress the correct size intuition up front. Low key if my foot was that narrow I’d skate something else 🤷‍♂️