There can be a difference simply based on the weather. I wouldn't worry about it so much not only is your car different but. Different day, temps, dyno, barometer, calibration, tuner, tune, wear n tear, etc etc. In a lab and with both calibrated they should read very similar.
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GTR TT 493Whp/431lbft, Ecutek, Southbend 6puck,Quaife, RPM RollBar 4Point, R888R, JRZ RSPro F(10R/10C) R(10R/6C) 1000f500r inlbs+150inlbs Tender, SPL everywhere. Full Specs
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