I would go with Legacy mode. It “just works”.
UEFI is more rocket science. And you never know what you will get. UEFI has a different implementation on every computer, while Legacy should work the same on any computer.
UEFI is a big insecure pile of crap (just my opinion). I have heard that UEFI is the size of the Linux kernel or bigger. For what? So you can have a mouse cursor maybe…
I might add that Legacy mode is still UEFI, not the BIOS of old. But Legacy mode is still better I think.