yea I can use both easily. Cubase is no slouch lol. hence why I use both. I like Pro Tools for the edit tools, particularly the smart tool, object/time selectors, and the stretch tool. Tab to Transient is invaluable. It's worth having just for Beat Detective, Insert Silence, ad Sound Replacer. Pro Tools is most beneficial because it's easy as hell to achieve a live sound with the ease of use of working with programmed, quantized, midi instruments. and you can do that using actual live instruments or using midi instruments.
In reality, anything you NEED to do to a song can be done in Audacity or Garage Band. But you use Cubase for a reason. Once you know how to use its features you don't want to use programs that don't offer the same features. This is the same with Pro Tools. they wouldnt be able to be such assholes about compatibility if they didn't have a program that out performs the competition.