Soju doesn’t give me hangovers, why?

So this a short, and possibly stupid, question.

Whenever I drink I usually get hangovers except for Soju (Korean Alcohol). I can drink four of the 375ml bottles and still feel fine. Other alcohols (wine especially) give me massive hangovers. Is there something special about Soju that makes it not produce hangovers or maybe I’m just not drinking as much as I think?