Do universal apps need reinstalling after move from G4 to Intel?

Hey. I apologize for what may be a silly question, but I just want to know--

I recently upgraded from a G4 Powerbook to a MacBook Pro.

I opted to move everything over automatically in target disk mode, which worked great. I must say I was impressed.

Now that I am on Intel, do I need to reinstall any Universal apps I had installed, to get optimization for Intel platform? Or, is the code base literally the same, and I am already getting the benefits of the Universal app install?