Confused about pension estimates for short term teacher

I only taught a few years but vested so I will get a small monthly pension at 62

A consultant sent me estimates a few years ago at how much would receive a month based on 62

The first one she mailed me had one amount, lets call it amount A, but then a month later she sent me a correct one with a slightly higher amount , lets call it amount B about 11% higher, tier 4 - I do not have ASAF afaik and I dont see it mentioned anywhere in the portal

So what could be the reason for the higher amount, both documents show exactly the same FAS and YOS?