I've used every brand mentioned here... They all work to some extent, the idea is to irritate any mobile invertebrate to fall off the rock. Then the offending pest can then be removed before going into your display tank. The thing is that not every undesirable will be removed (eggs, and some nudi's require extra time), so quarantine is still a great idea. A violent rinsing always helps dislodge anything as well.
The "organic" based ones are less stress on most corals than the iodine based dips. So revive, coralRx and Fauna marin will not, in my experience cause any severe stress to the corals. I think these are mostly pine tree oils or something that smells like pine sol...
I have noticed that CoralRx can be used at extremely high concentrations (10-20 times recommended dose) with no ill effects. The Fauna marin ultra pest control cannot be concentrated as it will kill many stony corals when used above 2x the recommended dose. So it may be a different product than coral RX or simply more concentrated/powerful.