I don't know if Cat will take Megan down as easily as Holly did, I don't know how much Megan has improved since the Holly fight (probably not enough).
But here's the thing, Cat is a way better wrestler and grappler than Holly, way better.
Besides Megan, who has Holly Holm ever out wrestled? No one. And the take downs I saw in the Megan fight didn't impress me. I think it says more about how bad Megans TDD was, not how good Holms wrestling is.
Zingano is one of the best TD artist at 135, I would argue her wrestling is the most impressive part of her game. Cat has a lot of variety in her TD arsenal, doubles, singles, lateral drops, you name it. Look at her fight metric stats, she TD's almost everyone she fights, multiple times.
If Megan fights Cat with the same TDD she brought to the Holm fight, she will get dominated. Because she couldn't stop the TD and she couldn't get back to her feet, all this will be much worse vs Zingano. Cat isn't quite the athlete Holm is but it's not much of a step down, Cat is still a decent athlete and she has the physicality to compete at 145.
Even though this match favors Cat stylistically, I don't trust her at all, inconsistent, lost 3 of her last 4, 36 years old, concussion problems. One big shot from Megan could change everything in this fight.