Personally I don't think one or the other in general will make a chameleon more full. It really depends on the volume and mass of what they are eating. If you feed a worm to a chameleon of the same age, size, etc. and feed a equally sized cricket to a similar chameleon it will make them both equally "full."
Chameleons in the wild are opportunistic hunters so really even if they are "full" they will still eat because their next meal could be for several days