fetch join vs join

안녕하세요 선생님 오랫만에 질문 다시 올립니다.이번강의도 정말 잘 듣고 있습니다. 아래와 같이 2가지의 다른 방식으로  queyrdsl를 사용하면  나가는 쿼리는 동일합니다.

하지만  jpa 에서 처리하는 방식이 다른거죠?  fetch join을 사용하면 LAZY까지  초기화 해서 한 객체를 만들어주고 다른 방식은 그냥 다른 두 객체로써 가지고 오는거죠?

  Member findMember = queryFactory

                .selectFrom(member)

                .join(member.team,team).fetchJoin()

                .where(member.username.eq("member1"))

                .fetchOne();

  Tuple findMember2 = queryFactory

                .select(member,team)

                .from(member)

                .join(member.team,team)

                .where(member.username.eq("member1"))

                .fetchOne();

 select

            member0_.member_id as member_i1_1_0_,

            team1_.team_id as team_id1_2_1_,

            member0_.age as age2_1_0_,

            member0_.team_id as team_id4_1_0_,

            member0_.username as username3_1_0_,

            team1_.name as name2_2_1_ 

        from

            member member0_ 

        inner join

            team team1_ 

                on member0_.team_id=team1_.team_id 

        where

            member0_.username=?

select

            member0_.member_id as member_i1_1_0_,

            team1_.team_id as team_id1_2_1_,

            member0_.age as age2_1_0_,

            member0_.team_id as team_id4_1_0_,

            member0_.username as username3_1_0_,

            team1_.name as name2_2_1_ 

        from

            member member0_ 

        inner join

            team team1_ 

                on member0_.team_id=team1_.team_id 

        where

            member0_.username=?