Abstract argument.
You've got all kinds of opinions from differing ideas and beliefs, and to each of us they are correct.
How can you compare two players or teams when they cannot compete against each other for superiority? Both Jordan and Kareem were (duh) a couple of the greatest to ever play...so what if Kareem dominated earlier in another arena? It's another place and time, as been mentioned it can't be calculated.
I wonder if people sit around art galleries and argue which painting is the greatest. That's what this is like.