I really don't think you'll see that much difference.
Most of the production work is done using CNC equipment.
I'd like to think they pay extra attention to quality control on the 85 Combat, but I'm not sure that is the case. The only place I know that extra attention is really paid, is with the top-end IPSC guns, where extra money is spent for hand-fitting and master gunsmith work.
My 85 Combat is as nicely finished as any gun I've got, now -- but its not a custom gun.
One reason the Combat models cost more is that they're different, because of the absence of the firing pin block. They have to change production practices to crank them out.
They're good guns, and I don't remember when I last heard a complaint, here (on the Forum) about an 85 Combat.
Heard one, long ago, and that same guy still whines about it on The High Road. He had trigger work done by Teddy jacobsen, Teddy told him he [Teddy] didn't care for CZ, and it was down hill from there. He offered to sell it here, I told him if he could wait a week or two, I'd buy it, after saying "sold," he backed out -- said he had a local buyer. But, he still has it, and still complains.
Some people aren't happy if they don't have something to complain about.