I use neither as well, although I did use QtCreator for a few weeks once, and its RAD (and vim mode) was nice for Qt dev.

The main features are the same across all IDE’s - debugger, code completion, refactoring, linting, Git integration, and build systems support. I’m sure there’s more, but like I said I don’t use them so I can’t name more.

Obviously VSCode can use plugins to do all this, same as many other editors. The line between IDE & text editor get blurry with plugins.