Does the P 220 euro mag base plate interchange with the P225 base plate.?

No, the P220 magazine is wider, thus the base plate, than the P225. That goes for the P220 9mm also, it's wider than the P225 mag. The P210 and P225 baseplates are interchangeable.

In addition the 225 plates and 220 plates have different retention systems. My 225 has the traditional push button retainer in the center and my 220 has the spring end cutout in the mag and plate.

thanks, that exactly answers my questions