My statements are relative, one is better at containment than the other. This doesn't mean that I believe that a homemade mask contains a sneeze by any stretch, just that's its better than sneezing into your elbow. Watched that spray too many times. In the same sense, the elbow is better than nothing I'm sure.
All depends on how well that homemade mask is made and worn I guess . . . plus, it depends on how good of an elbow sneeze catcher you are too.