There are 4Malak models in TSL. Jedi Malak with good face and jedinrobes. This is the one from the vision in the tomb on Korriban . Then there are 3 Darth Malak models. Which are holdovers from K1. The main model, the jawless model from a cutscenes, and a third model without his flowing cape. I compared both main models from k1 and K2 and they have the same animations.
Wondering if maybe they controlled it via script or something. Both animations from 2da are the same for the relevant animations