I have a pair of Pro Boots, I have had them for a while, I use them for Fishing and such.
I have a pair of Assault Boots as well.
Pro Boots are 'easier' to wear from new but as far as I can see apart from the extra padding round the top and the goretex lining they are the same as the Assault Boots.
You have to be careful buying them new though there are some 'fake' boots starting to creep in from the Far East of both the Pro and Assault Boots.
Not a patch on the genuine items, sizing is off and they are flimsy.