If it was the only knife I could own it would be the spartan, so very useful and it's the perfect size for an EDC pocket knife. I never warmed up to the alox, they feel cold and sterile in the hand and the pull on the blades is a little stronger than I like, good knives though.
The peanut would be a great second knife for when I wanted to carry something a little smaller or classier, it's just too small for food prep which I use my pocket knife for a lot. It's also the only knife I have ever broken in day to day use, the tip snapped off on me when I used it to bore a small hole in the top of a plastic water bottle to make a squirt bottle, didn't take much and it snapped clean off. I have never even bent a tip doing this with other folders, let alone snap one off.