We certainly get a better deal here on the RS - about 20% better when you factor in all the provided extras and the currency conversion - but the MX-5 prices aren't that different when you compare apples to apples, since we get the Club suspension goodies and LSD included with our GT. Also my MX-5 price was including the (as yet unobtainable) Recaros and PRHT, plus the Brembo/BBS package.I am also cross shopping the two. Except I'm geographically south of you, so the numbers paint a different story. I'm looking at 32k for a fully loaded mx-5, compared to the 42k for the fully loaded RS.
Now if the fully loaded MX-5 was $10k less than the RS here, it would make the choice much tougher,