Is Netflix free with Prime Video?

Netflix, Hulu, HBO, Etc.,Etc., IS NOT FREE WITH PRIME! If you have an account already with those you can sign into that account but you will still be billed separate for them, from your Amazon Prime account. The only thing that's free with Prime is Pluto Tv, stuff like that any pay per apps are not.

Which is better Netflix or Amazon Prime?

The bottom line. What does Prime Video offer that Netflix doesn't? In short, all the perks of an Amazon Prime membership. But if you compare them only on their streaming merits, it's no competition: Netflix has better original content, a better user experience and a better overall library of movies and TV shows.