I prefer Claude Code still because it has access to more tools - Junie seems unable to fetch URLs and do other things. But that's a tiny gap that JetBrains can close quickly, and the Junie UI is quite pretty. Plus, inside the IDE they can equip the model with far more advanced tools than Claude Code will have from the CLI: inside Code Claude has to explore the codebase by banging stones together with ripgrep, whereas in the IDE it can be equipped with tools to access the indexes and navigate around like a human would.
In theory, JetBrains should be able to compete very strongly in this market. Their single line completion model is already excellent.