Here are 2 identical queries performed on the ERC20_evt_Transfer abstraction.
V1 query: https://dune.com/queries/972378
V2 query: https://dune.com/queries/972432?d=9
As we can see, the V2 abstraction has a balance of 0.000000017683185664 which looks like a tiny rounding off error.
If you pull CSVs of both queries and compare side by side, the error should be identifiable.
If this is a rounding off error, this may have been reproduced elsewhere.