Smart file copying, what's better?

Question

Windows

There is a task to copy a bunch of files from one folder to another. But the trouble is that the names of almost all files are the same, but the contents of 25% of the files are different.
That is, it is required that the system, having stumbled upon the same file names, compare them in size, if the size is the same, then the files are the same, skipped and did not copy.
And if the size is different, I copied it under a different name, adding _ (1), for example, to the file name.
Is there a program that can do this? Or can someone throw in the contents of the BAT-nickname?

Answer 1

Total Commander