The CZ 85 Combat is a continuation of the original CZ-75 guns -- it doesn't have the firing pin block found in all of the "B" model CZs. In fact, that's what the B means: firing pin
Block. The lack of a firing pin block is also why it has an adjustable sight: CZ needed something to offset the lack of FPB, to get into the US by meeting the import "points" requirements, and adjustable sights did it. You'll find them on some other guns when adjustables don't really seem needed -- as with some small imported .32 and .380 guns.
The 85 Combat is very similar to the 85B. The 85B is simply a 75B with ambidextrous safety and slide release. (The mag release is not ambi, on any of these three models and can't be reversed; it can be reverse on the PCR, the P-01s and some of the other newer models, like the stainless steel guns.)
The 85 Combat can be tuned to have great trigger a bit more easily than any of the 75B or 85B models, simply because there are slightly fewer moving parts to lift or move or polish. If the one you handled had a smooth action, and it wasn't new, it may already be broken in. New, they sometimes still seem to feel better than the similar B models.
The 85 Combat comes with a slightly extended mag release, ambidextrous safeties and slide release, a mag brake that allows the mags to drop free (common on many of the newer CZ models), a trigger over-travel adjustment, and adjustable sights. The sights are OK, but nothing to get excited about. You can't buy one new without adjustables.
Re: sights. To fit the sights, CZ mills away an area behind the dovetail so that the adjustable sight can be lowered completely. If you take them off, you have an unsightly area, and if you go to different sights, you'll have to find something that looks right.
I've had a bunch of CZs over the years, (25+) and am a big CZ fan. The only CZs I have at the moment are an 85 Combat (with a
Kadet Kit), and a P-07 (and two other CZ pattern guns.) If the price isn't a lot more than the standard 75B or 85B, it's certainly worth consideration.
The Kadet Kit is a stellar addition to the gun. It's a.22 top end that can be a tack-driver (as the top end barrel and sights are always aligned; the slide -- a small section in the larger upper assembly, which looks like a slide but isn't -- is the only part that moves to feed and remove cases. Like most .22s, its got a fixed barrel -- and they're always a bit more accurate! Pull the slide stop, slide off the 9mm top end, slide on the .22 top end, reinsert the slide stop pin, change mags, and you're ready to do .22!)
When I got my Kadet Kit I also had a gorgeous stainless Ruger MKii Government model with the long slab-sided barrel; I eventually traded for a nice .45, because the Kadet Kit was just as accurate. CZs are known for their outstanding ergonomics -- like Browning HPs and 1911s. They have a good reputation for accuracy and durability.
The Kadet Kits are expensive. ($300+ used, almost $400 new.)