I would be hesitant to say BG are easier than TP in warm water. Could be, however. Perhaps a good test of that would be where TP and BG prey of nearly identical weights are available for consumption to an appropriate sized LMB. If we can agree that the LMB will target the prey that requires the least investment of energy ... AND ... if one of the two species is much less resistant to predation then the weaker prey species will be eliminated whilst many of the other prey species still remain.

Another take on this would be to do each species separately and determine the time it takes to consume them all. The easier prey species should be eliminated in a shorter period of time.

It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers