[TF-M] MCUBOOT_SWAP_USING_MOVE vs MCUBOOT_SWAP_USING_SCRATCH

Hi All,

I apologize for this probably trivial question, but I cannot find out if and why I should use MCUBOOT_SWAP_USING_MOVE or MCUBOOT_SWAP_USING_SCRATCH.

Are there any real advantages of move with SCRATCH other than that it requires less flash? - that is, min just one extra sector for all the images vs min one sector per image?

Move without scratch seems to provide a better wear balance but still almost all the examples I come across use move with scratch. What am I missing?

Kind regards,

Tomasz