Replying to Does anyone know about snowboard boots?

Ya I know, I'm asking on a ski website. But I only know about skis and hopefully I run into someone who's knowledgable about both sports that they are able to compare the two.

I have a friend who's looking into buying snowboard gear and we both know nothing about it.

We have buying boards and bindings down for the most part, but what about boots?

I know how to fit a ski boot, is it essentially the same for a snowboard boot?

I really don't see how they can be too important in terms of flex and stiffness since they all seem to be pretty soft.......if it fits it works?