it’s a different calculation… “vmg gain” is calculated from the start & end position, using the twd (average twd, from both boats) as the reference bearing. “average vmg” that you see in the table above is taking each boat’s twa & boatspeed, calculating the instantaneous vmg along the track, and averaging that. in principle the winning boat should have higher average vmg, but that is only true when there are no wind shifts during the tests and both boat’s wind instruments are perfectly calibrated. this is rarely the case, that’s why such a small deviation is not unexpected. place higher trust in the “vmg gain” value in this case.

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