Ok, it boils down like this. They get their parts from the same forging company in China, Scat finish machines their parts in the USA, Eagle has them machined in china.
Which is better, well the material is the same, but the scat parts are more consistant, and go through more quality control inspections then Eagle parts do.
Which would I run?
Scat crank, and I would spend a little more money and get a manley H-beam, they are Forged in the US so the material quality is better, as well as the machining