I know I don’t know much about Unreal Engine, but the Editor installation size is so large that I really think they can reduce the actual installation size of the Editor, compared to Unity Engine I think Unreal Engine installed a lot of additional components for me, such as platform support components (that should be can take about 20GB?), but that’s my opinion.
for me, the reason i use Unreal Engine just bcz i want to try to create some mod, idk where to start it so i decide to install the engine.