The thing about diction, grammar, spelling and punctuation is that they make things easier to read.
I like to sprinkle in a lot of line feeds too, for the same reason.
Just buy some Comps that fit you, and be happy.
A rigid shoe sucks to walk in. I guess I already knew how important it is to me to have some movement in the forefoot, because I also ski. But, it's very important. Trying to balance without that sucks, and trying to walk on an "easy" surface, like a paved parking lot, is also awkward.
Specialized builds some flex into the forefoot of most (all?) of their mountain bike shoes. So I wouldn't worry too much about that. Just read the product description or walk around in the store.
I think that more rigid shoes are also less forgiving of a poor match to the shape of the wearer's arch, or of weird biomechanical things. But, I think corrective insoles work a little better in a more rigid shoe. In other words, if your arch isn't as flat as Specialized's stock insoles or you have weird biomechanics that need to be corrected, you'll notice it more in a more rigid shoe. But, your insoles, assuming they're right for you, will work better.
If I were testing the Comp, Expert and Pro blind, without knowing what they cost or how their stiffnesses compare according to the Big S, I'd probably choose on fit and how I felt about the straps/buckles/whatever. Buckles are kind of nice but can get banged into things (ask me how I know
) and clogged (ditto.) Velcro does surprising well, actually, as long as I don't let the parts I actually use get dirty. I'm curious about that dial thing that's on some of the more expensive shoes.