In order to display the image in the EVF it is likely that the image needs to have reduced pixel count. It is likely that the software in the camera adds sharpening to the image while doing that.
Do you use any post-processing software on your images? If you do, you should be able to add further sharpening and or contrast/vibrancy on your PC. If you do not, then you may have to tweak the settings for contrast/sharpening/picture settings (normal/vivid, etc) in camera to where it suits you better.
I use a G85 and find that for low iso images, out of camera jpgs are close to what I want (default camera settings), but for higher iso images, I like the result better when starting from a RAW image (and the time commitment is roughly the same). I use ACDSee for postprocessing.
Niels