>>3998719>>3991913Exactly this—The panny 20mm is a fantastic lens, but superseded by the (slightly) better panny-leica 25mm.
I always found the 20mm (40mm equivalent) focal length difficult to work with as it's too wide for 'standard' pics and too narrow for 'fully wide' shots. Good image quality and bokkeh in both though. The pancake profile is a really nice usable size for m4/3 whereas the 25mm makes the camera feel more 'SLR-ish'.