I think part of ty's pitch is also that it's very simple to set up. I think only Pyright compares in this regard. I tried Pyrefly once and recall it being a bit more involved to start using.
They're all CLI tools and they all support LSP. The only setup advantage here is Pylance's, by virtue of shipping with VS Code. Other tools take two clicks to enable, plus or minus typing the tool's name into a search bar.