I'd have to agree with Abaddon. You have to ask what is better. Everyone has their preferences or favorites.
I like jazz and my favorite type of jazz is the bop that was hot in the 50's and 60's with players like John Coltrane, Charlie Parker, Miles Davis, Sonny Rollins, etc. Since not many people play that kind of music today, I suppose I'd say that music then was better than is today. But then not many people played that kind of music in the 1920's. So I'd also say that music in the 50's and 60's was better than music in the 1920's although the swing and jazz music that was happening in the 1920's led up to what came out in the 50's and 60's.