using the standalone comparison tool. and comparing: Oly EM-5, Pana GX1 and Canon G1X, this is my opinion:at all ISO (200-6400)- at center: G1X is slightly better than EM-5 and EM-5 is significantly better than GX1- at corner: EM-5 is significantly better than GX1, and GX1 is slightly better G1X
EM-5 and GX1 were tested with the same 50mm lense. I would like to see the same test with the panasonic 14-42 lumix X pancake zoom, to get something that is more equivalent in price and compactness with the G1X lense! This is some work for DPreview :)Compare big 50mm prime lense with pancake zoom is not play!
Concerning the false "ISO" from Oly, if you set the sample for EM-5 to 3200 ISO and both G1X and GX1 to 1600, you don't get significant difference, EM-5 remain far better than GX1 (both at corner and at center), the GX1 remain the best at center, and the worse at corner.