Consider using the zupreem natural if you want to stick with Zupreem.
As for Volkman, the one thing I don't like about the Super Hookbill is that they add peanuts. I've sent emails and talked to two of the reps about this but nothing has changed. The lovebird/conure also contains peanuts. However, I've used Volkman seed for many years.
There's always waste with my birds. They pick out what they like and the other "stuff" goes untouched and remains in the bowl or gets tossed to the bottom of the cage or out of the cage.