SUMMARY
When copying/moving a file to a path where a file with the same name exists, a dialog is shown stating that the files seem identical with the following tooltip:

"The files are likely to be identical: They have the same size and their contents are the same at the beginning, middle and end"

Perhaps this could be more robust.

STEPS TO REPRODUCE
1. Copy a file to a path where another copy already exists.

OBSERVED RESULT
A dialog stating the following:
"The files are likely to be identical: They have the same size and their contents are the same at the beginning, middle and end"

EXPECTED RESULT
I'd expect that a robust method is used to ensure one doesn't accidentally overwrite a file if it is different. I don't know how big the portions are which are being compared, but maybe a SHA checksum would reduce the likelihood of collisions.
The "Checksums" tab of the properties dialog already integrates various checksums, so that could be adapted.

SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20250329
KDE Plasma Version: 6.3.3
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.2
Kernel Version: 6.13.8-1-default (64-bit)
Graphics Platform: Wayland

ADDITIONAL INFORMATION