I will have to walk away from the pissing contest about the dashes on this BAT thread. Do not wish to hi-jack it and detract from the auction. For those actually interested in the difference between the the two dashes, other than the huge price difference, my thoughts are as follows.
Personally, I believe the exterior plastic is exactly the same for both dashes, and both are installed the same way (vacuum forming). Both have the exact same texture which does not match the OEM texture, but looks good.
The difference is the foam portion. The Vintage Dash foam is molded and is a single piece. Just Dashes removes the outer plastic skin and trims the foam where needed and then re-foams and shapes the dash. I think the problem here is that there can be areas of the Just Dashes dash that are not replicated as well. One of those areas is the center cluster where the three instruments are located. You can actually see the difference in the pics below, Just Dashes dash is on orange car, Vintage on the blue. The 'Deja Vu' Dash is from Just Dashes and was purchased, I think, before Vintage Dashes was in existence..or at least in it's infancy. The Just Dashes 'scallops' are a bit fat and rounded, where as the Vintage Dashes 'scallops' are a bit more sleek. I did a visual check with my '70 and feel that the Vintage Dash replicated this area much better than Just Dashes. I did not check other areas of the dash. Instrument fit is similar for both dashes.
The one negative for Vintage Dashes is that they omit some of the flaps in the glove compartment area. Not sure why that is as it would seem pretty easy to re-produce. The flaps are not visible once the glove box is installed.
Anyway, just my opinion for those that are interested.