They are two different things, and really not comparable.
If you want to do a comparison, compare Sound Forge versus Wavelab. Or compare Ozone vs. Waves Gold Bundle.
But asking which is better between Sound Forge and Ozone is like asking which is better, a piano or a guitar.
Both have demo's I believe, why not download the demo's and check them out yourself.
Ozone does not do wave editing (which is one of many reasons why you can't compare it to Sound Forge).
I use both. I do alot of editing work in Sound Forge and then run Ozone as a plugin.