So like

"at least it is a way we can tell the difference between him and his brother"

*Starts playing Violin.*

Obviously, you didn't catch the Deus Ex reference

Obviously I don't know what you're talking about. Please explain, as I am not curious... please? :3

In the game Deus Ex, the main character, JC Denton looks just like Paul Denton, except that JC wears sunglasses. All the time. There is a conversation where one of the other characters asks if he is really going to wear them on a night mission, and they end up saying what I quoted, roughly.

Ah, I see. Now I'm strangely interested... what's the game for? They got it on Gamecast?

It's a PC game. It was also released for PS2.