Titus from here feels very different from the Titus from Space Marine 2

I might be extrapolating too much but does anyone also get a feeling Titus here feels very different from the Titus we saw in Space Marine 2?

Maybe it’s just the different aesthetics/design, it being a short video rather than a game, but I can’t pinpoint what he’s feeling, maybe he’s not feeling anything. Same goes for Metaurus. Something about his narration feels deep, heavy but I don’t know how to describe it. I’m so used to seeing the heroic, serious Space Marines. This is just so much more immersive. I must have watched it about a dozen times now.

Is it just the lack of emotion resulting from indoctrination from such an early age, the conditioning and the centuries of battles they have experienced?