E-p3 vs e-pm2

Was quite chuffed as I just picked up my new p3 body only, but I think deep down I should paid a little extra and got a e-pm2 body instead purely because of the new processor and sensor,  I love the body and styling of the p3 and the built in flash.  Not sure what to do,  what would you do!  Stick with old or go with the new ?? Am I going to notice a lot of difference IQ wise, will be using it with oly 17mm

Any thought welcome

lee