Yes i think there is. The name being different hahahahahahahahahhaahhahahahahaahhahahhahaha.
No no, I think PCIe is faster and newer than AGP. One might even say that it was more 'with it'. You'll have to rely on someone smart, like Euphod for your answer. I think PCIe is smaller and means express. You can get more beefy, musslley and testorone fuelled video cards for PCIe. We are passed to Voodoo time in history now as far as i am aware of.
Why you asking? Are you thinking of purchasing one?