Guilin Sun
Ansys Employee

If your version 2023R1.3 does not show  this, please give your OS information, as my test is the same version in Win 11.

No they are not the same. MAX PLC EDGE LENGTH (UM): Forces the solver to break long objects into smaller segments in order to help with the geometry building with long and narrow structures. This is only available in 3D simulations with vertex insertion volume meshing.

I would suggest not to use max triangle quality as it will need a lot meshes.