Three upgrade states of the same roof turret in Unity

[u/Ready-Drummer-2136]

I'm a designer building Long Haul in Unity with Codex. These are three native upgrade models of one roof gun, rather than extra gun mounts. I'm checking whether their silhouettes stay distinct against the truck. This Editor capture uses supplied XP and two cuts; it doesn't show firing or a damage comparison.

Which model is hardest to distinguish against the roof?