Spiny Box, A.K.A Burrfish, is a puffer who's spikes are out all the time. Much more active and aggressive than most puffers also. The Porcupine Puffer, A.K.A Blowfish, is the ones you usually see dried and puffed with thier spikes out. When they arn't puffed, their spines lay against their body - very sweet disposition and act like dogs begging for food and eating from your hand.
These two are mixed up name wise a lot! But are very different looking and personality wise.
Chilomycterus schoepfi = Burrfish or Spiny Boxfish
Diodon holocanthus - Porcupine Puffer (make sure it is the holocanthus and not the hysterix - different species)
GOOD LUCK! Puffers are G-g-g-great!