There soon could be two Googles: one built for Europeans, with links to rival search engines and labels alerting users whenever Google is featuring its own products, and another version for everyone else.

The variations could result from what amounts to a split decision in two high-profile antitrust investigations into the California-based search giant, one by U.S. regulators, the other by Europeans.

Google emerged from the Federal Trade Commission's (FTC) probe in January with only modest concessions as U.S. officials essentially dismissed the most serious allegations of monopolistic behavior — namely that the company manipulated search results to benefit its services.