I couldn’t tell you since I actually don’t own a pair of either (though just hit on the red pandas so we’ll see) but I will say that I think for majority you can go tts and you won’t have a problem with with, they feel like they are almost a half-size larger so TTS or half down should be fine

I went TTS (10) and I do have a little wiggle room in the toes so if you want a snug fit, I’d say go down half a size. But if you have a wide foot or just like the room TTS is fine but I would not size up.

Comfort wise, I can’t say how it feels stock because terminators have pretty much no tech in them and the insoles they come with are practically worthless so I swapped them out and I’d say the overall fit is comfy around the foot.

The problem is they glue the bottom of the insoles so you can’t really try and swap them after you’ve worn them a bit. It’s pretty much a day 1 swap or nothing so sorry I can’t give you more info on that 😅