Why is one request better than another?

Question

SQL

Hello!
I decided to learn the basics of sql by solving problems on sql-ex.ru I'm
just starting out, so I don't understand why the site decided that the query

SELECT AVG(speed) FROM Laptop WHERE Laptop.price IN
(SELECT price FROM Laptop WHERE price > 1000)

better than

SELECT AVG(speed) FROM Laptop WHERE price > 1000 ( или laptop.price)

Tell me please