This reminded me of all the other actors that I can't tell apart.
Then there's Kevin Costner and Bruce Willis which might be understandable, but now, I've found that Alan Rickman, from this angle and lighting, doesn't look that far off. Sometimes, I can get Malcom McDowell mistaken for one of KC or BW and there's just no hope in hell for me in telling Malcom McDowell apart from Gordon Matthew Sumner.
There's also Patrick Stewart and Ian McKellan. They even sound incredibly similar. I don't have as much trouble with these two because they usually play very different roles, but when I see promo shots or very quick trailer cuts (especially when PS has a hair piece in his costume), I have to look very carefully to see the difference or look up the movie and see who it actually is. I didn't know if watching X-Men would make my head explode or what.
If I saw them more often, I'm certain I'd mistake Max von Sydow for Richard Harris all the bloomin' time. And there was a picture of Richard Harris that I thought was actually Peter O'Toole at first. I can't find it now though...
I also have to look carefully to tell the difference between Dustin Hoffman and John Hurt. And sometimes, I get either of those two mixed up with Robert De Niro. And now, we can add Sean Penn in here as well.
I talked about this with friends a long time ago. I realized that people in different cultures don't differentiate faces the same way as other cultures might.
Caucasians are used to telling people apart by their colouring in the eyes, hair and skin. But being Chinese, everyone has the same colour eyes, hair and skin, so I'm obviously not looking at that for my visual clues. I'm looking at facial features, shapes, sizes and distances from one reference mark to the next.
... I just like saying, "all White Guys look alike". =)