I've seen lots of SO posts and other articles on the internet about the differences between Google's ReCAPTCHA v2 and v3, but I'm not sure which one I should use. I'm looking to protect my website's sign up page (React frontend + Node.js backend). Which version of ReCAPTCHA should I choose? I feel like I've seen v2 in more places than v3, but then again, v3 is hidden... What are the security benefits of both versions like? Are websites less secure or considered "older" if they use v2?
Edit: The reason I ask, instead of just going with the newer one, is because I see a lot of sites still using v2.