This is more opinion than science, but I always thought dry ice made for a more violent explosion. We speculated that it was the extremely low temp of the CO
2 that made the plastic harder, more brittle, and more prone to catastrophic failure than warmer methods.
There was one guy who would drill a hole in the bottle cap and install a Schrader valve in it. IIRC (and there's certainly no guaranty of that), the bottle could take between 90 and 100 psi before it failed. If you filled it just shy of it's bursting point, it would bounce like a super ball.
