Just depends on the day for me. I've been drawing and writing for about the same time (hooray for middle school manga making), so sometimes I just feel like one is better than the other. Other times, I feel like I have a block for both.
In audience opinion, artist definitely. Most, if not all, of my art gets waaaay more attention than my writing. But that's only because it's so easy to look at what's happening in artworks.