From the pics in the ad, it would appear...
Pictures are good, but words are important too.

Please read with me the words from the linked page:
...with a low-profile hammer, allows for aiming without cocking the pistol so you can acquire sights faster.
The only 'low-profile" hammer I've seen on a SAA is on the Colt Bisley...and this ain't no Colt Bisley!

There are no standard SAA's that allow you to see the sights with the hammer down so I would tend to think this is a re-design that
might not 'markedly resemble' a SAA. The pictures on the website aren't that clear about the hammer, the large picture has the hammer pretty much obscured by the title and I can't really say for sure due to the angle, but assuming this is with the hammer down it sure looks different than any SAA I own:

I would not base my personal opinion on the photos in an ad. This really needs a hands-on examination to see how it compares to the original Colt. It is for this very purpose that the Authenticity Committee exists.