You see what each site does.

When you land on a site, you know in one second what trade it serves. The icon, the colors, the photos all match the service. Each site has its own custom look so there's no confusion.

It sounds small but it matters. A buyer in Corpus Christi looking for an electrician shouldn't land on a page that looks generic. They should feel like they're in the right place. The icon, the photos, the whole look tells them so.