I have both a full sized Griptilian and two Enduras, as well as two smaller MiniGrips and one Delica.
My choice for the big model is the Endura, but for the small I prefer the MiniGrips.
Grip family has better blade geometry (for cutting ability) and a superior lock system. But the full sized is a bit "fat" in the pocket, quite unlike the Endura, which carries very well. Also, the Endura blade feels sturdier and the knife is better balanced.
The pocket factor (diameter) is is not an issue with the mini sizes, where the MiniGrip feels better in the hand and carries as well as the Delica. Here the balance is reversed, and the MiniGrip has a better feel to it.
For slicing power, check out the hollow ground BMs. For full serration magic, go with a Spydie.
But this is just an opinion, and I believe either model or version is a great knife of outstanding value.