HoT and Mace are similar in that they both beat a "questionable" version of their timeline's big bad.
I know it's said that Mace would have been vaporized if not for Vaapad, which wouldn't be a factor against canon HoT. We know Revan is somewhere between Yoda and Mace (likely much closer to the former), and we know HoT is weaker than Revan.
I say HoT is above Mace, but not enough to where it isn't a fight. I just feel like she's fought far more Sith and her easy defeat of dark side versions of the Jedi Strike team and Weak Vitiate put her above Mace, who wouldn't have access to vaapad hax against her.