Night and day in my opinion. But these are all purely Feels so YMMV etc.

I like how especially the Claude Code CLI version communicates how it's progressing, something they hide a lot more on the desktop app for example.

I don't know about better but it's certainly different. It's painfully slow through claude code vscode extension compared to copilot but maybe "smarter", I feel like I have to correct it less using sonnet on both. I don't use opus much because of the cost but coworkers say the difference between harnesses there is also pronounced.