One can read and write notes almost perfect but his music itself is not hitting. the oposite the second musician who cant read notes makes much better slamming tracks.
This is a pointless comparison as you've slanted it by taking the good aspect of each thing and paired it with the worst case in each.
If you can read music AND have a gift for interpretation that would be the best scenario.
One thing doesn't exclude the other, in that form it's usually a question posed by people that feel insecure about having no musical education. I you feel like that then get some education, otherwise keep making slamming tracks and just enjoy doing so.
Being able to read and write though will certainly provide you with more opportunities for getting work whatever language you choose to adopt.
(I guess all that's just a less succinct version of Tim's reply...

)