Ok I am on European time so I read all these questions just now
I think the old St Gaudens is so very nice because the 10% copper in it tones and the striking lustre becomes glorious on an MS64 or better after toning
( When it is harshly cleaned it will scan darkly but the coin retones in 5 years time so a loupe is necessary )
Whereas the new Eagle coin probably has badly polished die and counter die and after toning it comes out pasty whichever way you look at it
It probably is an indifferent business strike and it is probably the strike that is responsable for the toning looking pasty.
On the other hand the Maple is a fantastic proof effigy on a proof background ( even if the background is kind of matte becaude of the intentional die scratches which are very close together ) and because of the purity it scratches even by looking at it
So the virtical lines were designed and executed in the proof devices background and they look like scratches which they are not but to the casual buyer these will hide real scratches
Problem is that since it is a proof effigy on a proof device and a scanner sees no contrast and a scanner needs contrast for a good scan
I attach the best scan I was able to make . The virtical lines are designed as such , any other lines may be bagmarks . Especially the leaf side has closely spaced virtical lines.
I bought these at melt from an exchange agent so I was not too picky. It was my friend an american coindealer who assured me the lines were intentional
In hand this coin just looks wonderfully brilliant ( and at melt price I just handle it since there is nothing in it to tone so the acid of my fingers does not affect the coin at all allthough maybe my fingers leave microscopic scratches

)
My friend is into South American coins and when they repolish the dies you often see badly repolished dies producing coins with bagmark like lines on the coin which will still go MS67 since no points are substracted for bad die polishing