When comparing Panasonic Lumix S5 IIX vs Fujifilm X-S20, the Slant community recommends Fujifilm X-S20 for most people. In the question“What are the best professional mirrorless cameras under $3000?” Fujifilm X-S20 is ranked 5th while Panasonic Lumix S5 IIX is ranked 6th. The most important reason people chose Fujifilm X-S20 is:
Large grip with a large battery, CIPA-rated battery life of up to 800 shots.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Video quality
Good video quality, features and performance.
Pro SSD recording
Can write directly to external SSD devices (up to 2TB) over its USB-C socket.
Pro Good stablization
Pro Large grip
Large grip with a large battery, CIPA-rated battery life of up to 800 shots.
Pro 20 fps continuous shooting
8fps continuous shooting with manual shutter, 20fps with the electronic shutter.
Pro Hi-Speed video
240fps High-Speed Video.
Pro Built-in flash
Cons
Con Sinister black look
A question of taste of course, it seems to be an "award-winning design".