I have used all 3 and this is my opinion of them all..
Repashy "Bug Burger" : It is a good feeder food, but you should also gut load with fresh fruits and veggies. It is to be mixed with water to form a jelly, I believe this also helps with hydration of your feeders ( when using this I NEVER water my roaches or crickets). The 16oz pack lasted me well over 6 months feeding 1000 crickets. My B.dubias didn't take to it like I my crickets did, not sure why.
Kilgore's "Dino Fuel" : It is a good feeder food, but you should also gut load with fresh fruits and veggies . I have used both the Regular formula and the "Raptor" versions, sometimes mixing the 2 with Bug Burger. I did this out of pure laziness. Instead of having to feed 2-3 different items , I just fed one. My B.dubias seem to like this version better than just plain Bug Burger. In addition , they LOVE it dry or shaken on veggies and leafy greens. It seems to be Adobo for feeders, lol. It seems to make everything taste better. lol
Cricket Crack : It is a good feeder food, but you should also gut load with fresh fruits and veggies .Everything seems to like this, it similar to the DinoFuel. One thing I don't like about it is there is something that my roaches don't like. Not sure what it is . They will eat everything in the Cricket Crack aside for this rice-shell/Seed-husk item that they just don't like and the result is it being littered all over my roach bin's.
Hope this helps.
Ps: As far as the color enhancement of the Dino-Fuel, it's all subjective. I have not done any side-by-side tests with similar subjects in a controlled environment. But the 2 Panther Chams i had on this diet showed really nice vibrant coloring.