It'd be an odd asymmetrical shape if that truly was a rear view. I chalk it up to TOS not showing the perspective properly and say they're the same ship, only with golden glowing shields activated in "Mudd's Woman" I guess it's quite possible the original artist intended the pointy end to be the front. Or that the glowing shield(?) was obscuring it's true shape. IIRC our first look at a Klingon battlecruiser was a similar golden blob smudge thing.
It's interesting to note that the TOS-R version of this vessel in "Mudd's Women" looks nothing like either of these. It resembles more like a Galaxy Quest N.S.E.A. Protector with TOS-style warp nacelles.
To make things even Mudd-ier still, I think that TOS mudd ship was based on some of Jefferies early concepts for the Enterprise?
The core of it--a one man version, was in one of Barlow's art books. http://en.wikipedia.org/wiki/Expedition_(book)
I suggest you verify check your links to make sure they work after posting. You got the / url tag inside the URL. http://en.wikipedia.org/wiki/Expedition_(book)
^And your link has the exact same glitch. It's a problem with the BBS software -- it always leaves a final parenthesis outside the link.