Another m43 body and 43 Glass post.
If you are tired of them let me know
I read on another forum that the 4/3 70-300 is a little faster then the m 4/3 70-300
I don't have a m 4/3 70-300 so I can;t really compare
BUT I can compare the E-PL1 and E-520 using the 70-300
I went out last evening to see how much faster AF and How much better IQ. About 10 shots with my E-520 and my E-PL1 using the same Zuiko 70-300mm. It was poor lighting where the Zuiko 70-300mm usually Sux.
Well ....... a noticeable AF speed and IQ improvement over my E-520 .
Took a picture of a Robin