I mean yes and no, they use some of the same techniques and come from similar bases but it's hard to make direct comparisons across MMA versus WMMA to begin with, especially Welterweight versus Strawweight. I mean Dern and Maia don't fight the same way, either...
I don't think
@fortheo meant for it to be that deep, either, so much as he was suggesting that archetypically & narratively the fights were superficially similar because you had "High-Level Folkstyle & Freestyle Olympic Hopeful Wrestler Who Picked up BJJ and then MMA vs. Legendary BJJ World Champion who Transitioned to MMA".
It's very true that Dern's submission game hasn't proven to be the "one-shot, one-kill" or "the floor is lava" against recent levels of competition that it was back in the day. However, even when she's not able to close the show she is able to put girls into near fight-ending sequences -- sometimes on multiple occasions across 15-25 minutes. The issue used to be that she basically sells out attempting to get to these positions so if she didn't score the sub the fight was basically lost in an all-or-nothing affair. However, against Hill (fairly low bar to clear, granted) we saw a different mentality where she placed a much higher emphasis on GnP and positional grappling as well as some really aggressive boxing. The fact that she's able to consistently and even
casually reverse girls from bottom is also quite telling, IMO. The sub isn't everything.
Maybe Tatiana's physicality and wrestling base (and I mean heavy, physical base -- not just her pedigree) would allow her to control those positions from top and shut down Mackenzie's active guard in a way other girls haven't been able to do, but it's a dicey prospect.