What is the difference between Joss Whedon and Sylvester Stallone as directors? 
Joss Whedon:  He is the founder of Mutant Enemy Productions and co-founder of Bellwether Pictures, and is best known as the creator of the television series "Buffy the Vampire Slayer" (1997–2003), "Angel" (1999–2004), "Firefly" (2002), "Dollhouse" (2009–10) and "Agents of S.H.I.E.L.D." (from 2013). Sylvester Stallone:  He is well known for his Hollywood action roles, including boxer Rocky Balboa, the title character of the "Rocky" series' seven films from 1976 to 2015; soldier John Rambo from the four "Rambo" films, released between 1982 and 2008; and Barney Ross in the three "The Expendables" films from 2010 to 2014. Sylvester Stallone:  He wrote or co-wrote most of the 14 films in all three franchises, and directed many of the films.
television series