I just copied files that already exist and got the "Confirm File Replace" dialog. I was missing an option to show the hashes, so I searched the forum.
Related:
The rationale against displaying hashes seems to be performance reasons in most posts from GPSoftware staff. However, I'd argue to separate optimizing performance from the user making the decision - the decision has to be made first, and to be confident the files are the same, I'd like to have hashing. Would be nice if this can be implemented (or allowed to change what "identical" means). Two files can have the same attributes (modified, size), but still have different contents.