There will always be deviations from the values shown on the insights of an influencer's account. This results mostly in differences in the algorithms how the data is analyzed both from influData and Instagram or TikTok and that audience data on influData is calculated only from real and active accounts.
TikTok and Instagram generally calculate these metrics from the whole audience (including inactive Accounts and Fake Accounts), which is not interesting for collaborations. influData in contrast calculates the followers (public profiles) who have interacted with the influencer in the last 12 posts. Still, these deviations should not be significant, and the tendencies should be similar, especially tpo our Audience Analysis.