Aggressiveness has a lot to do with it IMO. Not necessarily moving forward, but who's throwing more punches, who's landing the cleaner shots, and how well a boxer is protecting himself from harm. Not escapinp and running, but dodging and effective head movement. I'm fine with a guy doing potshots and countering if he's getting good defense in.
I agree with the 10-9 during a knockdown round. Only way I'm scoring a round even is if they each knock each other down, or the opponent gets close enough to ending a fight. You have to justify getting knocked down, and saying you made it an Even round.
I also like the analogy of "which fighter you'd rather be,"
I don't think I'm even close to decent at scoring rounds, but when it's close I feel like its a matter of time and control of the round. If a guy controls and dominates the first two punches with effective jabbing and good defense, I don't think it's fair if the other fighter gets in good shots at the end of the round due to aggression and sloppiness