I'm currently learning both at the same time. For me, some of the things taught to bass players has helped me extremely in understanding how to play guitar. They really are the same instrument only one doesn't have a B string. Learning the bass arpeggios has helped me learn my way around the fretboard in a way I wasn't able to comprehend before.

I wanted to learn more of how a song is put together by playing the bass but it turned into a better learning tool for guitar. I don't think you can go wrong learning more, it just may take a while to get further along than you may have anticipated. Good luck!!

Tim