I tested Aider a few times, and gave up because at the time it was so bad - it might be time to try it again, and I'll add that my experience with seeing how Claude Code works for me while lots of other people struggle with it suggests to me that my experience with Aider might well be that my style of working just meshes better with Claude Code than Aider.

Claude Code was the first assistant that gelled for me, and I use it daily. It wrote the first pass of multi-monitor support for my window manager. It's written the last several commits of my Ruby X11 bindings, including a working systray example, where it both suggested the whole approach and implemented it, and tested it with me just acting as a clicking monkey (because I haven't set up any tooling to let it interact with the GUI) when it ran test scripts.

I think you just needs to test the two side by side and see what works for you.

I intend to give Aider a go at some point again, as I would love to use an open source tool for this, but ultimately I'll use the one that produces better results for me.