I run in a spec RX-7 class that allows street-porting but no carb mods. We don't have Spec Miata in our area but it will no doubt emerge.

I am curious if SM's run closer to each other than do Spec/Pro RX-7's. This hypothesis stems purely from the fact that carbs and timing make for the biggest HP variation in RX-7's and since these factors don't really apply in SM then these cars should be more equal.

Also, is a SM more forgiving than an RX-7? I.e. does driver skill/experience get highlighted more in an RX-7?

Any observations from the crossover folk who have built and/or raced both?

p.s. please excuse the fact that this is not a pure IT question but this is the best place on the web to get both informed RX-7 and Miata racers to answer.