They’re broadly similar lenses, so the choice is often about small optical differences and system compatibility rather than a huge image-quality gap.

From the community feedback, the Panasonic is often reported to be a bit softer in the corners, while otherwise the differences are marginal. That means the Olympus may have a slight edge if you care about corner sharpness, but it’s not a dramatic separation for most shooting.

Your camera body can matter too. On Micro Four Thirds, Olympus bodies typically rely on in-body stabilization, while Panasonic has often used lens-based stabilization on some lenses/bodies. Mixing brands can sometimes mean fewer stabilization benefits or setup quirks, although many newer bodies handle cross-brand use better. In practice, either lens will mount and work on either system, but matching lens and body brand can be the simpler path.

So: if you use an Olympus body, the Olympus lens may be the more seamless choice. If you use a Panasonic body, the Panasonic lens may be more straightforward. If price is the priority, the Panasonic looks like the better value; if you want the slightly safer bet optically, the Olympus may justify the extra cost.