Lotta stuff going on here...
The Case knives, are you buying them sight unseen? For garden variety Case knives there will be a pretty wide tolerance for the things you are complaining about. And at $60.00 for an American made knife, that's what you have. At that price point you're buying a cutting tool. If it cuts, opens, and closes reliably that's what they're meant to do. On these knives you'll find gems, and you'll find rough knives. Blade marks don't influence cutting, opening and closing. They only matter to collectors.
If they're new and bought from a reputable dealer they should be returnable. It's hard to imagine how you could have beaten up one of them in a few hours or days enough to make it unreturnable. If you've been using it for months, then of course you should expect evidence of use.
You can't reasonably generalize about any line of knives bought sight unseen from a sample size of two. You can't ask a broad question about the quality of a given knife brand and get usable information. The word 'quality' has almost no meaning in this context.
If you have any of the older 300 series Buck knives, you've seen blade clash before. I've got a bunch of them, I know.
GEC makes a fine knife, but their lower priced knives can suffer from blade clash just like any other brand. My 66 Calf Roper has marks on all three blades, and they were marked right out of the tube, brand new. It's an inexpensive GEC offering, it's just a knife. It would be nice if the folks at GEC would learn to make a slip joint knife that wasn't a thumb nail buster, though. Seems easy enough, lots of manufacturers have done it. But that's an argument for another day.
It wasn't until the internet came along that things like blade centering, undefinable pull ratings, and the other things we complain about became so important in run of the mill knives. A lot of manufacturers, including Case, churned out highly polished knives with fancy scales that were built from the ground up to be collector pieces. They were beautiful things, sometimes gaudy as heck, but they were shiny as can be, and had no cutting edge or blade points to speak of. And they were expensive. Didn't matter, they weren't bought to cut things. These days these expensive knives go begging for half or a third of their price from thirty years ago.
Oh, well.