I am interested in buying the new superfly's but wont ever buy a boot without trying it on. I know no retail shops near me that sell the superfly, but do supply the vapour V. My question is, if i tried on the vapour V, would it give me a rough idea of what size i should get the superfly? or do they differ in shape too much? and if it isnt how can i tell what size i should get the superfly? do they fit tight so i need to get a size larger? or vise versa?

please help asap x