Mainly, location. Southern ponds often do just fine with stocking bluegills first, then LMB a year later. Up north in my neighborhood, we deal with stunted bluegill populations a lot. Very common. Giving the bluegills a year head-start with no predation often means the LMB will not be able to adequately control BG numbers, and we end up with stunted fish.

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.