They both suck balls and they aren't even good, if 당신 want to hear a band with REAL 음악 then try listening to this singer who is the lead vocalist of two bands. His name is Tim Lambesis.
Oh your not going to like the 답변 people give 당신 의해 asking this.
For their 음악 they both sing bad in my opinion. For how they act I would say One Direction because after what Justin did I will never respect that guy. He doesn't even deserve to have 팬 after what he did. Honestly,personally I prefer 1D outside the whole 음악 thing.