For one thing VS Code has a full debugger with breakpoints and stack analysis that supports many backends out of the box, that's an IDE feature.
Sublime doesn't have any (real) debugger even with plugins. Some attempt to tack on a debugger but they have to do so via popup menus or overloaded "magical" text buffers and it's atrocious. Why can't I click on the line I want to break on? Why can't I see the stack in a nice editable tree? Right, because sublime is a text editor and VS Code is an IDE.