6 on the medal means Chinese Classical Gardens. This is the wording that occurs on all the Classical Garden medals.
Despite the differences you pointed out, I believe the designer did a pretty good job in transforming a 2D painting into a 3D image.
Thanks for providing the meaning of the Chinese lettering. Those will be the first letters I shall learn!
Just to reiterate, as I already commented in my post, there was absolutely nothing critical or negative in my observations. I just looked at the painting again and started seeing the differences I highlighted. I found them interesting and illustrative of how the artist wanted to
interpret the original drawings. A carbon copy would not have been laudatory of the artist's skills. So it is actually a good thing. My comments had nothing to do with the quality of the work on the medal which, IMO and FWIW, is in keeping with the quality and ingenuity seen in other medals of the series.