So I'm guessing they are the same to a degree. I understand that JSpec typically uses millimeters vs US inches. Easy enough to Google the conversion however I do the math on sets with "face progression" and it just seems so high when compared to standard offset. Is there something I'm missing here?? Thanks...BB

Totally different things. A bigger offset allows a hair more time for the club head to close before impact and is mainly to prevent slice. Head progression is for optimal distance gapping and spin progression throughout the set.

So the numbers are not one in the same? Meaning offset specifications are not interchangable with face progression specs? Thanks

Face progression and offset are exactly referring to the samething but using different method of measurement. Do a search here for Tario's very detail post or blog on the subject. The value is exactly opposite in meaning, l.e. The higher value in FP, the less offset of the club if I remener correctly.