Hub dyno's (Dynapacks) read higher than roller dyno's (Mustang, DynoJet, DynoDynamics,Land & Sea, etc) by design. There's less rotating mass since the wheels are removed. But every one of those dyno's have software in different locations so they will all read different, EVERY SINGLE ONE. DynoJets are the standard because as someone mentioned, they are the most popular and widespread. Reading low or high means nothing in the long run since a dyno is only meant to measure progress to a delta, not a absolute ceiling.
Also as previously mentioned, trap speed's don't lie and are the most accurate method of comparing power.
And for the record, Greddy Emanage Ultimate sucks ass. I've seen and used the software and I would want nothing to do with it. It looks like something programmed on an Atari. And with it being a piggyback, it is very limited in what it can do - hardly "Ultimate". Not a knock on anyone using it, just my personal opinion.
__________________
|