When the SAFE button is engaged in the Limiter, it is pretty much the same result as if the Enhance (ie Inflator) function is set to 24.1%.
UAD SONNOX OXFORD INFLATOR GENERATOR
Inflator is a harmonic generator which generates odd harmonics and functions as a clipper in appropriate circumstances. This is how the Limiter avoids intersample overs. The Enhance fader is a version of the Inflator algorithm. The Sonnox Limiter _includes_ Inflator, albeit in slightly different form. Also, it'll keep its value whereas the resell on Ozone is.well.you can guess. But as a link in your chain the Ozone is more like a bunch of cheap tools whereas the Sonnox stuff is very, very nice. level, the iZotope Ozone would be the best bargain for you. In regards to the Ozone comment, I think if you're using all plug-ins, or doing mastering at an amateur or semi-pro. At least, not nearly as much as the Inflator. But if you have no problem getting your levels where you want them without much compromise the limiter won't do much. If you're having a tough time getting the level you want go for the limiter. And at this stage it can really be controlled via the "Curve" control. It seems to smooth out the distortion from the A/D and can add quite a bit of level (so that you don't need to hit the A/D as hard).
I like the Inflator right before the limiter on heavy rocky stuff. Just try the demos, dude: Sonnox Oxford Plugins