That is a nice gun...the one at Collector's, while not as good a deal, has three things going for it. Acme steel barrels. Better overall condition. Better engraving.
The engraving on the Collector's gun is just 'very very nice'. It is more profuse than the one at Bain's - approaching A grade IMO. It is also a little deeper than usual, yet lots of tight scrolls. And the case colors are just 'right'.
It looks like gun that was used carefully and occasionally for 10-15 years then put away for a long time.