. . . would IMDB/MovieChat list "Seinfeld" as a similar show to "The Sopranos"?
shareIt says in the "Recommended For You FAQ":
We take all of the movies and TV shows that you have either rated or added to your Watchlist and then compare your data to ratings made by other IMDb users. We can then find movies and TV shows that people with similar tastes to you like. For each recommendation, you can see a list of the movies or TV shows upon which the recommendation was based. You have either rated these titles highly, or added them to your Watchlist.