Scorelines aren't always the best indicator of a beatdown.
Depending on who's serving first, a single break can be either a 63 set or a 6 4 set.
Take the A0 07 final, and the Wimbldeon match between Venus and Maria. The AO 07 final had the more lopsided scoreline. But there an equal number of breaks in each match (4) for the winner, while never losing serve.
However, in the Wimbledon match, on the games Maria did hold, she had to fight off over a dozen break points. And Venus NEVER faced a breakpoint. In fact, she lost nine points on serve, two being double faults.
I'd argue that the Wimbledon match was more of a beatdown than the AO final.
But then on your argument, you're still going by stats rather than actually watching the match.
The AO 07 was the biggest beatdown I've seen purely because of the way Serena was playing, it was a bigger beatdown than the 61 61 vicotry imo. Some of the shots Serena made to go up 5-0, I've never seen anything like them, and when she got a break point, she took it, no questions asked, she just hit winners at will. It was frightening. Venus pounded Maria and beat her down, but a beat down is more than about the tennis, it's about mental attitudes and the look in someone's eye, Serena was out to destroy Maria that day you could see it in her eyes, she didn't miss and she crushed Maria both mentally and physically in an hour winning nearly twice as many points. The way Maria praised Serena at the trophy presentation saying, she knew she could win it etc. It's the highest praise I've seen Maria give to another player after a "big" loss. Exemplification of a true mental humbling. She got over it I think though, she went into their Miami match thinking she could win, that's the fighter she is, but for a few hours (possibly days) after that AO Final Maria was broken.
Whereas after Venus' match, while she had been humiliated again, I just didn't get that same feeling that her spirit was broken, afterall she did save a lot of break points and fought very well, even if she was taken apart in the end.
There was just something implied in the subtext of that AO Final match that I've never seen before and I don't think I'll ever see again.