Is there a difference? I currently own the P229 E2 and the mags are different from the early production of P229 because of the new design grip. Does anyone know if the P226 with E2 grip will take older P226 mags? Thanks in advance.

I don't know how old your "older" P226 mags are to which you are referring, but I know the same mag works with both a non E2 and an E2 grip for me presently.

That's the answer that I was looking for!! Thanks!!!

To change a P226 to an E2 grip, the grip and the hammer strut and spring are changed. That's it. There's no difference in the frame across the P226 line. So unless you go far enough back in the line to find a time when a change was made to the frame size, P226 mags fit all P226s, regardless of the grip type. (And I don't know if in fact that's ever happened.)

I suspected that but wasn't sure because the P229 changed their frame with the E2 grips. Thanks for the heads up!