Panasonic - Lumix S5IIX vs Sony - FX3

These two are evenly matched on the broad strokes, with the decision sitting on which individual spec advantages weigh more for your use.

Pick the Lumix S5IIX if you care most about max video. The biggest gaps in its favor are max video.

Pick the FX3 if you care most about xlr input. Its strongest claims are xlr input.

Both ship with comparable optical zoom, sensor size, so those specs don't separate the two — focus on the differences below.

Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity tells you both are well-rounded; the differences are about trade-offs, not quality.