The full-size Rescue is being redesigned, almost certainly with a new blade steel. If you have to have a Rescue right now, I'd get the Jr, which has VG-10 blade steel, but I'd hold out for the new model full-size. Dunno when it will be out,though.
Brian,
I just picked up a rescue Jr. in orange and VG-10. I was surprised at the blade length, I expected something smaller. I'd choose the JR. unless you need a larger blade.
Blade length: Jr. 79mm 3 1/8" Rescue 92mm 3 5/8"
Chris