Actualy I have played urban terror, it sucks compared to CS, they realy have the weapons screwed up bad (I have been trained to use a few of them, CS is more accurate), the game physics seem a bit less realistic, and a common trait with the Q3 engine is that everything in the game looks like it got a fresh turtle wax coat.
The CS concept is origional, the use of real world weapons, counter-terrorist vs terrorist (as opposed to the red team vs the blue team) money buying, hostage rescue, bombing, etc. are what made it unique (well didnt have the bombing missions at first). Before CS everybody packed 50x50lb rockets in their backpack with railguns and BFG 9000's.
TFC and its clones were actualy the most popular mods at the time before CS. Granted rocket arena had the 'you die then tough shit' play method first, but it lacked everything else. I dont know what makes you think wolfenstein created origionality in this genera.
The only other game that I like besides CS in this specific type of mod is strikeforce, the creators of that one did a damn good job at the realism (save for a few things) but for some reason its just not quite as fun.
EDIT: Actualy something I might add to what vampireuk said: CS being the most popular is the most prone to being targeted by the cheaters. Thats just the way things go. For example, windows is probably more secure than macOS but nobody ever sees the security holes in macOS because nobody realy wants to target it, because nobody realy uses it!
Theres been a recent crackdown by server admins to run a blacklist of cheaters, thus far it its quite successful, in the end we will find out weather or not it works when most of the server admins adopt this blacklist.