There's NO difference in fit/finish or functionality between Case's CV knives and their SS line, due only to steel type itself; the notion that the stainless knives are only intended for display cases is laughable. All of these knives come off the same identical production line; as with any high-volume producer, there'll be some good ones, and there'll be some not-so-good. Most of my Case knives (of which I have dozens) are SS, and all of them are users; and good users at that. In particular, I have several '75 pattern stockmans; all but one are stainless, and all have similar fit/finish and functionality. Those particular patterns are likely the most consistent across the board, and virtually indistinguishable in fit/finish, blade pull/snap and functionality. The eventual patina on the CV example is the only obvious visible distinction, aside from the 'CV' stamp on the tang. The CV versions are moderately easier to sharpen, using exactly the same methods and stones (and strops) I use for my SS versions. Once the edge is applied (at same geometry & edge finish), they cut and perform essentially identically.
I also have four Sod Busters, two of which are CV (large yellow '38 patterns), and the others are stainless (one each of the '37 and '38). Both of the large CV models came with visibly uncentered blades, and some wobble. The smaller stainless one is the best of them all, with no play, perfect centering, great snap and the best primary grind and tip on any factory blade I've seen; a beautifully thin slicer in it's purest form. That one I carry most every day. I've also thinned the edge grind on the larger SS version, then applied a polished convex. It has taken a wickedly-sharp slicing edge, and does so as well as the smaller and much thinner hollow-ground small version.
Bottom line, if one treats any of these knives as 'users', which implies making an effort to sharpen & maintain them as such, it becomes clear they're perfectly capable in that role. If one wants to buy the 'pretty' stainless ones and put them in a display, so be it; to each his own. But those 'collectors' will likely never be aware of what they really have, if they're buying those knives only for display; that's usually where uninformed notions about the perceived 'uselessness' of those knives take root and get perpetuated.
David