I don;t know how you would measure popularity. I think it is fair to say that MySQL has more visible mindshare. I guess if "popular" is a synonym for "demotic

I don;t know how you would measure popularity. I think it is fair to say that MySQL has more visible mindshare. I guess if "popular" is a synonym for "demotic" (in the sense of progressing away from professional dba's etc) then MySQL is also more popular in that sense too. But in terms of actual mindshare, it is rediculously hard to compare them.