Comparing the Olympus 25mm f1.2 PRO against the almost vintage Lumix Leica 25mm Summilux D f1.4 (NOT A SCIENTIFIC TEST)
Maybe the best lenses for Micro Four Thirds are Four-Thirds lenses? No one looks for the original Four-Thirds lenses when they are shopping for a prime or zoom, but even though they are larger, heavier, and older than the newer lenses, they still render an incredibly pleasing image.