Pretty much.

The Kol and Sins units in general do have more detailed textures but they're all static structures. In SC and CoH, the units are animated in everything they do. The Fatboy, for example, opens bay doors and visually produces units while it's rolling. Every one of the turrets moves to face targets and they recoil when they fire. Docked air units park and refuel on the platforms on its back. The treads visibly roll.

Not that it's a big deal (again, I think the graphics in Sins are fine as-is) but if that counts as detail, then yeah, I'd say the ones in SC hold up much better in that regard.

Frogboy: Yes. I think any capitol unit (Tech3+) has as much or more detail as a capitol ship in Sins. This is running everything in Sins maxed, without mods. Supreme commander has more life too it, and it was a bland game. I only brought it up because I knew someone would use the 1000's of units vs the COH comparison. Keep in mind, I'm not comparing styles. WW2 tanks/Future tanks/Starships are very hard to compare and say one is better then the other. However, when I zoom in on SC/COH, I see units looking alive, whether in a firefight or not. In Sins I see a chess piece, with occasional weapons effects. Do the beams/bullets even relate to the damage done? They dont seem to.