It's hard to to rate the quality, I just feel like it does a better job of knowing the codebase and what I am working on via whatever mechanisms they have implemented.
I also find the DX better, I only really use the right click to mark code to talk about, and then the chat. The accept/reject changes UI works better imo.
In short, I barely have to do anything to use the AI features, just feels right.
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Just try both, I didn't feel like Cursor suited my style much, Windsurf had me hooked instantly.
I switched to Windsurf 2-3 months ago, feels a lot better for me.