All boots fit different even if they are in the same line. Flex has nothing to do with how wide a boot is. Burton IONs have a narrower toe box than the burton ambush. If you want a wider toe box that isnt too wide i would recommend the Burton Hails or Grails. Great boots for all-mountain freestyle and have way better quality than 32.
On a side note but just as important. Everyones foot is different so the best thing to do is to try on as many boots as possible and find what fits best.
-Its not how fast you ride...Its how you ride fast