The FCC label on the right is from the current Nexus One for T-Mobile, with ID NM899100. The label on the left comes with ID NM899110, which appears to be an identical model with just one digit off. The RF reports show that it has 3G on WCDMA Bands I, II, and V, meaning that it’ll work on AT&T (and Rogers, Bell, and Telus) along with most of Europe.
Source: Engadget