I think at MS-69 it's not quite as subjective. I'd imagine NGC had half their grading team going over this one at high magnification because you don't want to make a mistake on a coin of this magnitude.
EDIT: Just looked over it on the Heritage site at full zoom and there's a good sized gouge on the Eagle's breast. Did they miss that?
Scratch probably looks much worse in photos than in hand. If it's not highly distracting in hand I'd say MS-63. The coin has booming luster which is a plus.
MS-62 but that reverse toning is going to bring a significant premium and possibly a star with the reverse features. Spectacular flash of rainbow there.
Thanks dryer coin makes sense I was scratching my head how a mint error, or anything, could shrink a coin while maintaining the appearance of a rim but that nails it. Thanks for the feedback.