That wasn't my point, but I didn't spell it right out, so maybe that was my fault. I used Justino and Maines as examples of why women - cis or trans - shouldn't have to pass some kind of "femininity test", because not all women choose to conform with the narrow norms for what a woman is and can be*. I was also deliberately poking the bigots in the eye with photos of a cis-woman who doesn't meet the narrow norms and a trans-woman who does. My post wasn't about who could beat whom in a fight, but since you took it in that direction, I decided to play along and posted the photos of Dern and Viana to demonstrate that, no, you actually can't tell that Cyborg could beat Maines just by looking at them. In fact, we can't tell much about either one of them, just by looking at them. And anyway, Maines is a fighter, just not an athletic one.
*Thinking about this some more, all of us benefit, directly or indirectly, from women pushing back against the restrictive norms of who a woman is and what she can do. In the case of those two, as a fan of MMA and of television shows, I get to enjoy Cyborg and Maines plying their respective crafts, no thanks to the dolts who want them to stay in their respective lanes.
Caster Semenya is another example of a woman who has been persecuted because the body she was born with doesn't fit the narrow norms.