Definitely the Spydiechef, and here's why: A shiv that's good for food prep can ALWAYS put some work in, on any given day. It'll also encourage you to cook more, which is good for you.
One poster here, years ago, posted a pic of him doing food prep with some too-small knife. I asked him why he doesn't just use a chef's kitchen knife, and he replied: "The knife in my pocket is the only sharp knife in the house." He had given up on sharpening the cooking knives, because of the way his wife abused them.
Maybe that's not the case with you, but damn, wouldn't it be fun to do food prep with your EDC?
FWIW, I like a light EDC with a 2.5 - 3" blade. So many folks here carry these way-too-big folders for mild EDC duty.