Hi Seb,
Just so you know, Shawn at Church Automotive Tuning was not given any details or background on the tune or comparison. The only information he was given is that it was previously tuned and to see if more could be made. No other information was given to him.
Other than the possibility of the ECU changing its short and long term trims, I can't say why they are different but I will vouch for Shawns integrity. He wouldn't fudge results as some have hinted. Not for me, not for anyone. Nor would I.
I'm thinking it is quite possible that both of your results were/are accurate at the time of testing.
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