my original 481whp and 501whp dynos were both on the same dynojet dyno, the one chart is being displayed on the shop's dynojet software, the other chart is being displayed on the dynojet software on my laptop.
For this most recent build, my usual shop with the dynojet was not available, so the DynoDynamics dyno was my only option, I look forward to dynoing on the dynojet in the spring to get a more apples - apples comparison.