Smart Follower metrics do not always update instantly and may refresh on a schedule. Different platforms also use different definitions and filters for “smart” or “quality” followers, so numbers often don’t match.
Buzz’s model is designed to weight credible, high-signal followers more heavily and filter out low-quality or bot-like followers, which can make the count appear more conservative. If you want to refresh your smart followers / followers count immediately, click the “Refresh” button on any Buzz page in the “My Stats” field.