If you're like me who prefers having million tabs open you'll find vscode to be much easier on memory usage with multiple project windows open. Also the extensions are nice although i do not know how good they are versus intellij.
Maybe it's a workflow fail on my part when using VSCode but I like IntelliJ's multi-project handling very much (it mainly boils down to: one window per project, and if you relaunch it it will remember your open projects/windows, but also a few other small things.)