Duo Card What Is The Difference Between A Memory Stick Gaming Pro Duo Card And A Regular Pro Duo Card?

What is the difference between a memory stick gaming pro duo card and a regular pro duo card? - duo card

I would buy and watch the PSP's Memory Stick PRO Duo line. I wonder what is the difference between a game of Memory Stick Pro Duo PRO Duo and a regular? I use the card in the regular PSP? Limits?