The biggest difference is that I learnt most of the shortcuts that I need in intellij, so I barely use the mouse when programming, and that for me makes a huge difference. In intelliJ there is a great plugin called Key Promoter X that tells you the shortcuts for every action you do that could have been done with a shortcut, it is super easy to learn and remember the most used shortcuts. I couldn’t find any plugin like this for VS Code, if it exists, please, please, PLEASE, let me know in the comments!
As I know it is hard to go and check from time to time the cheat sheet of VS Code shortcuts, here is a compilation of the most used (by me) shortcuts that you(I) should remember first:
Just as knowing the language and the paradigm you are working is a must, knowing the tools you are using in order to work effectively is also a important. It makes a difference.