The LA2A style comp is a very aggressive device, the fact that the real units are tube reveals that in many fashions it also functions a bit as a "pre"...I use my Mohog 1176's as pre's all the time and it is a really one of the primary go-to's for the 2 buss, not really intended as a pre...
Thats why I thing UAD has done a great job on their version, it sounds remarkably like a pre with a bit of dirt and lots of "color" when you push it...having owned the real thing and compared it to the emulation I can say the difference between the two is very thin, and the difference between the UAD and Cake versions is one step removed from that...the Cake version stays pretty subtle, clean if you will, the real life units do not.
But ultimately back on discussion IF a comp can be used in a noticeable fashion, its not hard to dial it back to "un-noticed" but the reverse is not always true...