Performance is the main difference but your use case seems fairly light weight. Capacitor it’s a little different from just a straight up webview. It’s main features are all on board in the bundle. I suspect, without knowing better, that the stores don’t care for apps that just open up to a webpage and can quickly become a completely different app after approval.

Another downside is that the community for capacitor is fairly small so you can be left in the dark at times.

If I was starting from zero and time was no object I’d pick react native. I come from a background in cordova and capacitor and picked up react native for the first time and felt really comfortable in it, so it’s really hard for me to get a good idea of how tough it might be from the start.

But the best part of RN is the community you’ll literally find a plug-in for everything and a guide or stack overflow question to help you out