Suburban counties that are bluer than their core anchors?

[NorCalifornio]

The only ones I can think of right now is Palm Beach and Broward being bluer than the larger and main Miami-Dade county. Summit county is bluer than Salt Lake county as well. In the Atlanta area DeKalb is more bluer than the main Fulton county due to the higher black population.

Fort Bend will probably be bluer than Harris soon as well.

Summit County isn't SLC suburbs, it's the ski resorts on the opposite side of the Wasatch Range.

[NorCalifornio]

Yolo is more Democratic than Sacramento, though it's debatable if it's suburban per se.

As somebody else said, part of Yolo County is suburban Sacramento, but most of it is not. The only reason it's more Democratic than Sacramento County is the college town Davis, which is even more sharply distinct from the nearby suburbs than the similar situations of Ann Arbor and Durham, NC. So I'd say it doesn't really count.

[NorCalifornio]

If we include independent cities, Petersburg is bluer than Richmond, VA. Like Clayton County, GA, it's mostly black.