don't know of any info but it's an easily discernable visual.
the smaller upper bout radius isn't very correct looking & neither is the cutaway/horn
the 1982 Mint Collection EGs are a huge improvement.
the smaller/upper bout & cutaway/horn dimensions are much closer to the real deal than the EGF
a lot of folks won't notice something so subtle; it's been mentioned here before tho' ..................
the arch of the cutaway/horn radius is not as continuous on the EGF, and you can see that creates a very pointy looking horn, with less material in the cutaway radius just above the horn tip.
The distance between a center line of the body & the smaller bouts on the EGFs is just a bit longer than on the EGs.
This also effects the cutaway issue & the smaller/upper bout issue.
I believe the Burny RLGs consistantly have the most accurate looking demensions AFA body perimeter & cutaways ...........
The most accurate looking example I have is probably my BLS-59
1980 EGF-1000
The MC models have more materaial in the cutaway radius, because the radius arch is cut more correctly.
Result = a much more rounded, less pointed looking horn tip
Also, just a hair less distance from a body center line to the smaller bout edges = better/corrected arch demensions 8)
Mint Collection EG