i personally have tried diffrent commercial foods. I find it a waste as mine don't eat it much and it usually expires before it's halfway gone. It depends on your dragons taste and the color of it.
On a side note, i've started using the food as gutload for crickets and mealworms.
List tried:
Bearded Dragon Dry Formula (by t-rex)
Bearded Dragon Diet, Adult Formula (Fluker's) [side note- smells good and kinda sweet]
Cactus Fruities: Cactus Fruit Treat (Ecotherm) [had some
success with there, i mixed it with dry food and gutloaded]
had this other stuff to, but i can't remember the name, i think it's Dragon bites or something like that. They are red cubed things that are moist. Mind didn't like 'em.

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1.0.0 Bearded Dragon (Rex- "normal" orange fire)
1.0.0 Bearded Dragon (Glutany- German Giant Mix)
0.1.0 Okeetee Corn (Okatee)
0.1.0 Spotted Python (Shoelace)
0.2.0 Dwarf Hamsters (Tipsy and Bubblegum)
0.0.1 Rose Hair Tarantula (Goopy)
1.0.0 Boyfriend (Brian)