Im a long time user of both.
Where cubase wins:
- in place editing of audio files
- audio file management (a massive plus)
- hit points
- Management of video files
Where Logic wins
- Quality of its native plugins and instruments
- The Environment (this is a massive plus)
- Transform function
- the latest interface is really good
For me a sequencer lives and dies on how it enables you to manage its audio and video files and how good its native plugins are, so they both have positives. Peronsally speaking i try not to use third party plugins for processing or effects as ive been burnt before when trying to open a project 6 months and 1 reformat down the line. Logics are bloody amazing.