If I want to switch opam switch, should I use eval $(opam env --switch=<switch_name> --set-switch) or opam switch set <switch_name>? why are there two ways to do this?

[brando90]

related but how to do change switch from within python: Is eval $(opam env --switch={switch} --set-switch) equivalent to opam switch set switch? and What is the difference between eval $(opam env --switch={switch} --set-switch) and opam switch set SWITCH? - Stack Overflow