Looking for a moat in the technology is always a bit of a trap - it’s in the traction, the brand awareness, the user data etc.
Traction, brand awareness, and user data do not favor Windsurf over GitHub Copilot. The few of us who follow all the new developments are aware that Windsurf has been roughly leading the pack in terms of capabilities, but do not underestimate the power of being bundled into both VS Code and GitHub by default. Everyone else is an upstart by comparison and needs some form of edge to make up for it, and without a moat it will be very hard for them to maintain their edge long enough to beat GitHub's dominance.
Same with Google vs OpenAI. I tend to agree with the sentiment that I most frequently hear which is that OpenAI is the currently popular brand, but that can only carry them so far against what will eventually be a better offering for cheaper.