In the end, the most effective way to evaluate Pubky it to be interested in it, and how things like it work, why they differ, etc.

While it can be easy to start by contrasting it to Nostr, there is no way for me to do so while also making Nostr lovers feel comfortable and superior (unless I lie, coddle, equivocate, undersell Pubky, etc, etc).

Many people would already consider Nostr a success, and for many different reasons, including myself... it just depends on the context.