Not using mmath but actual facts here. Amanda has taken clean shots from both Cyborg, and GDR. Those are two heavy hitting women. So I think her chin will be just fine. I don’t see Megan knocking Amanda out. Barring that one shot (behind the ear for example) that just makes lose all equilibrium, giving Megan the chance to capitalize.
Megan is a freak of nature, and hits really hard. Those are facts, too. But, in her last few fights, I’ve seen her to be a mostly one dimensional fighter. If she doesn’t get the quick knock out. And especially if her opponent gets her down. Then she has very little chance of winning the fight. Especially against higher quality opponents.
I like Megan, but I give her a puncher’s chance only. And the credit for that also belongs to her opponent. Amanda is a different type of fighter.