Follower numbers don’t matter, that’s a twitter fiat mindset. Quality over quantity!
I get what you're saying , but Ive actually never used twitter, I just wondered why different apps showed different numbers
primal has a caching relay (so it is my guesstimate) that there is a delay from the actual data. njump.me also is a bit of delay. the most up to date data i always see from nostr.band but that is also dependent on what relays are public, i'm not sure if covers some of these more private relays, you'd have to ask @brugeman