I’m sorry, I might not be understanding this question correctly, or I’m missing something. imdb.com is the internet movie data base and soundunwound.com focuses on music database. I can’t really compare this two sites because they foscus on completely different areas. The only comparison that I can give you is that, for example, if you search lady gaga in imdb, it’d give me a list of movies that has lady gaga’s songs in them. If you search lady gaga in soundunwound, it gives you the info such as basic biography, alubm releases, and her news.