I also really like maroon 5 but the only one who everyone really knows is Adam Levine. Depending on the country if you've heard of bigbang you'll have heard of different members. Plus 하루하루 (haru haru) is the only music video that has ever made me cry so well done to bigbang.
If there was a neither button I would have clicked that, however, big bang is better than maroon 5. I can't stand Adam Levine's voice and just him in general. I do also like the electronics in Big Bang. K-pop really doesn't bother me than much because i like music from other countries.
While Big Bang has very upbeat music, Maroon 5 is better in my opinion. Their music is very solid and calming. Not only do they have a more relaxed type of music, but they are also a very charitable band having supported the ASR for a long time, since 2004. They went as far as doing a live song for the tsunami survivors. Not only are they a strong supporter of ASR, but they also support Bonnie J. Addario Lung Cancer Foundation, support lesbian and gay rights, and have made active moments against global warming.