It is very very viable when it comes to the modern era.
Because of video footage. I will not get into it but anybody with a boxing IQ over 50 can tell that Alexander Povetkin is not as talented as the best version of Riddick Bowe.
Or that Tony Tucker is more talented than Samuel Peter.
The movements, tactics, techniques, foot work, etc ring generalship is all on display via video so you can easily break down that Tucker >than Peter and
Bowe >then Povetkin.
But the black and white eras without footage or with limited footage is kind of hard to do.