I swear I don't work for Framer, but I've been using it very intensively for UX testing and users aren't capable of differentiating the prototypes from the actual real thing:

https://www.framer.com/user-testing/

The prototypes can be heavy on the browser, but once you go past that the immersion level is deep. You can even add custom google analytics events for quant analysis.

Thanks for this, I'll keep this in mind.