No, PS is far more feature rich than Pixelmator. Pixelmator had a far better UI, OTOH, and is a pleasure to use compared to CS3.
CS6 UI reminds me of Light Room 4 which pales in comparison with Aperture. I'm sure you're aware Apple charges $79 for Aperture. I don't think Adobe got the memo with their bloated thou$and $ software suites and dingy interface.