First: it used to be COL (Cartridge Overall Length).
Second: I have two CZ-75s (not CZ-75Bs) and they are throated as long as any other 9x19 I have.
I'm sure you know, but any gunsmith can lengthen the throat for you. Take the loads you like and have them cut the barrel for you, if your gun won't "plunk" them.
Used to be it wasn't referred to as many different mathematical possibilities as exist for the 3 letters. For clarity I use OACL: Over-All Cartridge Length.
So, you're saying that Pre-B CZ75s were throated longer? I've been aware of this issue about as long as the 75B has been in existence, and no one I know that's had it done has been completely satisfied with the accuracy result after having a gunsmith cut a longer throat.
I've always suspected that this resulted from when CZ, then imported by Magnum Research, offered the 75 in 9 x 21mm where the only real difference was the barrel, obviously chambered and throated for 9 X 21mm and the recoil spring of heavier weight.
Springfield Armory XD and XDm pistols are also throated short in 9mm, as I'm sure you are aware as a member at XD Talk. It's the only reason I don't own one today. These are not the only 2 brands that do this, I just don't have any interest in the others that do. There ain't much that I will buy knowing in advance that it will need a trip to the gunsmith.
Lastly, if we're gonna get technical, I asked about the Canik S-120 and not the CZ75.