In my opinion, seed is seed whether it's in a bag with a buck on it or in a burlap sack. What you are paying extra for in the food plot seed is generally research and marketing. The benefit to a lot of the food plot seed is that it comes already blended and sometimes inoculated and coated. If you by bulk seed, you will generally have to buy more than what you need and blend it yourself. Not hard to do, but it may or may not be cheaper. If you are planting just one variety, then buying bulk is probably a much better way to go. If you want something like Whitetail Institutes Power Plant, then you're going to be buying a bunch of different seeds to mix together, and you may end up spending just as much.