No.

My list goes Steam > Xbox > Ubisoft > EPIC.

As far as I can tell Steam and Xbox move the fastest and don't mess with my framerate if I accidentally forget to close them after launching a game. The Ubisoft Launcher is fine but it causes quite a dip (about 20 frames) and in general uses up more system resources for me. The EPIC Launcher is just clunky overall. It's the only launcher on my system that I disable at startup.

Also, Steam has the fastest servers when it comes to downloading games in my opinion, followed by Ubisoft, EPIC then Xbox.