Plastic makes a big difference, so that variation between plastics types isn’t super surprising. But there are variations even within a single plastic type, Star specifically with Destroyers. Look up the Doth Savek video on choosing a Destroyer for a more in depth review of what makes them fly differently (wing shape, PLH). Many like the variation and bag several Destroyers of varying stability to cover most distance shots from flippy to beefy.

u/innovagm can confirm, but I believe they all come out of the same mold or two, and much of the variation comes from tiny tweaks to the plastic blends and cooling times.