black tie, white tie

[FreakPower70]

I thought the point of black tie and white tie was that all the gentalmen are to be dressed generally the same or at least within standard expectations. Not "sticking out" would be out of respect for the host and other guests just like not behaving rudely etc...

would this not mean that if you are invited to a black/white tie event that you should not show up in the kilted equivalent?

Also, after going over wiki's idea of highland blakc tie and white tie they mention a white waistcoat for white tie and a black one for black (makes sense). But would it be also acceptable to wear a tartan waistcoat for either?