My two favorite knives are the spyderco endura (pacific salt actually) and spyderco military. I have plenty of other knives that spend most of their time in a drawer, but these two constantly battle for pocket time. Both are excellent examples of large, tough folders with lots of handle that somehow manage to carry small. If you have large hands and you like your endura then I think the Millie is a no brainer.
The zt knives are well made and tough but they feel like a brick to me compared to the slim lines of the endura and the Millie. I carry my ti Millie inside waistband and forget it's even there.