Am I Allowed To Sue One Band For Sounding Like Another?

This has been bugging me for too long: I've just listened to Zero 7's "In The Waiting Line", and while it is a good track, it sounds a little too close to that French band Air's sound. Have you compared them side by side?

Here is Air's "You All I Need", off of their 1998 album,"Moon Safari":
Now, hear this song from Zero 7 from their album, Simple Things







While it doesn't sound exactly like Air, the resemblence is uncanny. Yet it seems the fans of either group don't know about the others' existence. Weird.