I've had a couple Kanatis and really like them. They are quite a bit different than a Whip when you really get down to it, but I do agree that they have many similar characteristics.
The Kanati is shorter, has larger tips, wider limbs, and more reflex. I also think it's a hair louder. The grip is nice and it shoots a quick arrow. The wood choices are limited, but I like the black limbs with charcoal riser.
The Whip (I've had a ton) allow for more wood combos and will have smaller tips and a thinner limb but deeper cores. I prefer the grip...a little larger and has the thumbrest. Very quick turn around time as well as many in stock bows to choose from.
You couldn't go wrong with either.
I've never shot an Endeavor but I wouldn't mind. They look nice.
p.s. Jason mentioned to me in a past email that he was working on a 56" bow that would pull past 29" I'm on board with that!