[Ambiguous]

I prefer DarkComet, but there are billions of RATS and each one of them has their own strength's and weaknesses. All of the RATS that you listed can capture audio and webcam, spread over USB and peer-to-peer,remote desktop, etc. I don't get why you need so many functions, because all the RATS have about the same functions so I suggest just trying all the RATS out for yourself and seeing which one you prefer.