If we fit a trendline through all the data, we find that the riders are on average 1.6416sec quicker per run. If we then correct Conner and Ryan's laptimes to compensate for this progression then: Conner Enduro: Mean = 110.68sec Min = 107.85sec Conner Dreadnough: Mean = 109.94sec Min = 106.30sec Ryan Enduro: Mean = 102.58sec Min = 101.98sec Ryan Dreadnough: Mean = 100.82sec Min = 100.77sec Conclusion: The Enduro is slower for both riders when taking into account laptime progression with run number.