Yep. The Griffon is a composite material, not as weak as plastic, but not like the metal of the Jester. Obviously, the Jester is a tad bit heavier and more expensive than the Griffon. I think it has a higher DIN minimum/maximum as well, but I'm not sure.
Basically, if you feel like you need the burlier binding, go with the Jester, although the Griffon should hold up almost anybody just fine.