chevrolet.comvsonstar.com

Chevrolet edges out Onstar modestly on homepage messaging, 68 to 63. Here's where the gap comes from.

Chevrolet is clearer about what it does (60 vs 52 on clarity). Chevrolet has stronger CTAs (75 vs 57). Onstar is better at saying who it's for (ICP: 40 vs 0). Onstar's targeting is decent, while Chevrolet's is absent.

Chevrolet uses a "Trust / Authority" positioning while Onstar goes with "Price / Value Leader" — fundamentally different approaches to winning the same buyer.