Find Duplicates - (1) Safe to use? (2) Huge Discrepancy/ Difference?

Is it safe to delete all (319,000+) files located/ found by the "find duplicates" tool provided by Parallels?
Currently, on my machine, the tool claims it can free up 40+ GB of space, yet other similar applications, such as Gemini 2 and Duplicate File Finder Remover, claim only to free up 20+ MB of space. Obviously, more is better here, but I'm not entirely sure why there is a large discrepancy.

The other similar applications don't appear to be searching through my iCloud folders. Could that be it?

Please, advise.