I don't know what you meant by "Type", maybe you meant to say Size?
Anyways, I think your best bet is to keep them separated if there is a great size difference. If starved, Crickets will eat each other, their own young, and even their own eggs. Although, you shouldn't be starving your crickets anyways.
Just a friendly reminder that in general, your crickets shouldn't be larger than the width between the eyes of your Bearded Dragon. Personally, I use much smaller crickets. They don't chip at night, so I get some sleep. And they are more likely than adult crickets, so my beardies get more excercise in the cage.

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CANADIAN CHAMELEONS