Gmail browsing is a bit different in G Suite and Afi when it comes to email threads:
- in Gmail emails are grouped and counted in threads, but in Afi emails belonging to the single thread are shown and counted separately
- number of backed up emails in Afi is the same or larger than the number of email threads in Gmail
Example - here is a thread between two people consisting of four emails. These four emails are shown as separate emails in Afi and as a single entity in Gmail.