Not to sound like an annoying college professor - but have to say that is a very poor analogy. The Z28 has an entirely different engine to the 1LE - among countless other differences.
A much better comparison and almost identical intent from Ford would be like comparing a Boss 302 to a Boss 302 Laguna Seca.
Spending 56k on a Track Pack GT350 that kicks ass is so much sweeter to me than paying 63k + ADM for a GT350R....but hey i'm just a dummy.
I was focusing more on the fact that the gap in performance is similar between both makes and cars... Z28 falls a little below the R and the 1le falls a little below the base 350.