Primal uses caching (from several relays) so probably is more accurate.
Because of this caching you can also find people easier on Primal 

 nostr.band also shows accurate follower counts, fwiw.

https://nostr.band/npub1hghnjjpnvkz8t6gkszuf37d7puwc2qtxc65rnklqsngzv6kkug9qhhfyz2 

 This. 

https://image.nostr.build/61b95af2c805a193451e24a1f84994b297f35bb382f96264c35e259bdd9d83ea.jpg