Based on reviews it seems image quality is almost down to sample variations between the 75-300 and 100-300. And it's easy to say the Panasonic on a Panasonic body and the Olympus on a E-M1/E-M5/E-P5 with the 5 axis IBIS. But I had a 45-200 on my E-M10 for a little while and it seemed real close, 3 axis vs Mega OIS. To the point were even slight subject movement, not using a tripod, anything could just as easily be why one shot looked better than another. There are several threads on 5 axis versus Mega and Power OIS, but not much that I see on the 3 axis. Any idea which would be better?