Greg, I just came across this new version of the Isle of Capri $2.50 chip. The Inlay is much darker and the UV mark on the darker version is a slightly larger H&C and it's maked on a different location on the chip. You will also notice a much thicker Kansas City, MO. The 2nd "A" and the "T" are almost touching the points on the inlay.
Sorry Greg, I have only found 1 in my collection. I guess I need to make a roadtrip to the casino and see if I can find more .
I've picked up the $2.50's over the years at Isle so I don't know if it's a old or new chip.