Scat have been around for ages doing pretty good work, they primarily do circle track parts which is constant high rpm levels, and alot of the classes require lightweight stuff to really accelerate hard out of the turns. I was checking out one of their lightweight big block chev cranks yesterday, was an absolute work of art. I liked it that much I actually made a serious enquiry about the price ($2500 2nd hand)... but wtf am I going to do with it?
Eagle is a relatively new company with products aimed at the budget end of the spectrum - although in saying this most applications would be well within their limitations.
It's harder to be an innovator of products, rather than mass producing a copy of others.
Edit: Although I find it hard not to giggle a bit everytime someone mentions "scat"