Think it was the glass…may have also been me, I’d ridden a fair way!
Only pullin’ yer leg – all wide angle lenses distort towards the corners. Easy enough to fix in LR or PS though.
Now to be more constructive: I had a play with both when trying the new OM-D the other day. I didn’t get to look at the snaps I took in a dark shop with poor lighting on a PC, but at full zoom on the camera’s screen, both seemed very sharp wide open, even in the corners.
The whole package was very very impressive, and that’s from someone who usually lugs about a 5D MkII and L-series lenses!