I've been to Windsor and Motobecane's sites. I have also searched them out here. Aside from name recognition i can't see what would be inferior. It would have to be the frame i guess but that seems hard to prove on such inexpensive bikes.
I know a couple guys have acquired the Windsor Bristol on this forum, but i have never seen a review. I know that these are cheap bikes so spare me the, "who cares they are all crap" comments.