I'm on a lot of vitamins also, doctors orders... Theres really no difference, it's just marketing.. It's much more important to buy quality vitamins in the first place, that are guaranteed highly water soluble, usually you get them at health food stores.. They cost more, but really work, unlike a lot of cheaper vitamins that basically go in one end, and out the other without releasing all of they're vitamins..
Good luck. 🙂