Do you mean wavelab?
Wavelab is a fine mastering tool but it can't master within itself, you need plugins to do the mastering (although it comes with some of its own plugins), such as equilizers, exciters, compressors, etc..
Ozone is an actual plugin geared towards mastering (actually about 6 plugins in one). I believe it's 64 bit (the standard is 32). The sweetest thing I've found is that it has a multi-band compressor, exciter, and stereo imager. You can adjust each band too. I'd recommend downloading the demo off of Izotope's site to see if it suits you. If anything download the mastering manual, it's a good read regardless you have Ozone or not. Ozone is a cpu hog however, wouldn't recommend it if you have less than a 500 mhz computer.
T-racks has pretty glowing tubes, that's about it.
-Sal