I don't know but I prefer the Pentax images for the most part. Greater isolation and a more defined line draw. The OOF areas seems way better as well. When shooting flowers, I tend to shoot wide open, spot meter, and adjust EC to control highlights. Maybe you need to leave the Oly home and work closely with the Pentax. I really watch for color saturation as well on flowers, too much looks weird to me. I shoot Fujifilm and dig the chrome simulation because it calms down the saturation on red, greens, and yellows to a more natural look. I suppose that is a matter of taste. You have a fine camera and glass in the Pentax but I think it's a little foreign to you. Try shooting some flowers wide open, leave plenty of room for crop, it will smooth out those backgrounds and isolate the subject better, producing a wonderful line render. Spot meter. Often times on the fuji, on bright sunny day, the shutter will kick over from mechanical to electronic and a lot of magic happens.