This is black dyneema/wasabi (bottom), steel dyneema/wasabi (middle) - so you could see the contrast, and steel cordura/UV (top). Pardon the unglamorous patio chair.
For a bag like the Tri-Star, I personally think it holds it's shape better and is more protective in cordura. I exchanged the Aeronaut in cordura for dyneema for the extra pliability; too perfect once black became available. But that bag would be floppy if not stuffed. It stood on its own in cordura.
I was never a huge fan of wasabi, but it's a lot more lively paired with black vs steel. Totally jumped at the chance to get a black dyneema/Iberian S25 but sadly I don't think it has ever been offered in the Aeronaut - my tags are still on just in case!
Long story short, if you go black, go dyneema. More personality. But consider if you need the cordura posture in your Tri-Star.