Copilot in VS Code has model options, the new agent is available in VSC Insiders that will implement full features and show it's changes in a diff viewer. Jetbrain IDEs don't have the option to change models
And their default model is pretty bad in JS/TS world. (but great in C#)
Copilot works great for every language but the plugin integration into JetBrains IDEs is not as deep.