Google is testing a new "all places" and "compare now" interface to see businesses and third-party comparison sites outside of Google Search. This is something Google launched in the European regions but now some are seeing this in the US with this new user interface.
I spotted this new interface that shows both local listings from Google Business Profiles on the left and then a list of comparison sites on the right, in the mobile interface. This was shared with me on X:
This was also spotted by Jaimie S in the Local Search Forum:
We've seen many variations of these comparison sites in Google Search over the years, but this one is kinda nice.
Forum discussion at X and Local Search Forum.