I've never done a great deal of whittling, but when I did, I found that the smaller the blade, the better. The pen blade of my peanut, and the small blade of a Vic tinker are good. My friction folders are everyday cutting and slicing tools for whatever. The blades are too big for small detailed work like whittling a chain or a box in the cage. Although the Opinel's do great work in the kitchen, slicing and dicing for a good stir fry.
Carl.