As you can see from the comparison video above, The Outer Worlds is not at its best on Switch, since the visuals and performance take a serious hit on the system. The textures, framerate, lighting, and more have been downgraded to run on the hardware.
None of this is exactly surprising. At the same time, playing on Switch is better than not playing at all. The Outer Worlds still has great writing, interesting choices, and a delightfully twisted sense of humor. If you have no choice apart from Switch, then this port is worth playing. But if any other options are open to you, explore those instead.