I found during my time in China that many people in China really love to compare those they know to others. This is especially true when it comes to the appearance of foreigners. In my time in China I was compared to Backstreet Boys, Mr. Bean, David Beckham, Jake Gyllenhaal and more. While I'm very flattered to be compared to them, except Mr. Bean...., they are not at all accurate.
I would strongly recommend not telling foriengers they look like someone else because the majority of the time they don't. Not all foreigners look the same but many Chinese believe we do in the same way many people in the West think all Chinese look the same. If you are not familiar with a race of people you will think they all look quite similar, but it is in fact just because your brain has not yet learned to differentiate them yet.
I would strongly recommend not telling foriengers they look like someone else because the majority of the time they don't. Not all foreigners look the same but many Chinese believe we do in the same way many people in the West think all Chinese look the same. If you are not familiar with a race of people you will think they all look quite similar, but it is in fact just because your brain has not yet learned to differentiate them yet.