Your query returns 5 rows total. The EdgeDB query returns all movies that Zendaya is in [1] and, along with each movie, the first 5 credited actors.

Also, it looks like your version also does implicit joins (like EdgeDB), but I'm not sure how they would work in that style.

[1] Or maybe only movies where Zendaya is in the first 5 credited actors; I'm not sure.