Hi, An easy test might be to look at some ISO bracketed tests images (0EV = perfect exposure, then one at -1 EV and one at -2 EV) shot in Manual mode, in several softwares.
Shutter speed and aperture being constant, sensor receives same light amount resulting is same exposure (ISO being gain only)
Softwares applying camera adjustments will show two underexposed images (Olympus Workspace - although undoable within the +2EV slider margin) and FastRawViewer (in grid mode), for instance, but
Adobe Bridge, DxO Photolab4 (within secs) and FastRawViewer (in full screen mode) will show same exposure for the three images (provided the one at 0EV was not underexposed) and confirmation is given in Adobe Camera Raw where the three images absolutely look similar.
This might explain why some Olympus users are of the opinion that Tif exported from Olympus Workspace are sharper, have more contrast, other colors, etc - in case they didn’t notice/cancelled the camera adjustments chosen for eventual easier back screen viewing (same for Color Space also)
I regularly use DxO Photolab4 Elite Deep Prime and export with “Optical corrections + Denoising only” option and don’t see any oversharpening (mostly birds) - but with lens sharpness set to 0 and unsharp mask turned off.
Just checked PureRaw by curiosity and found output to be similar to Photolab4 DeepPrime one.