BB's are mostly propelled by a pocket of air from the chamber and typically backspun via hop-up, while i'd say most paintball markers are launched by a physical

BB's are mostly propelled by a pocket of air from the chamber and typically backspun via hop-up, while i'd say most paintball markers are launched by a physical bolt slamming into the paintball and driven out of the barrel normally (with the exception of tippmann's flatline barrel) Psychology and this whole milsim thing aside, some of the tech driving the airsoft/paintball 'guns' reflect their country of origin. In asia, access to HPA/co2 tanks isn't has widespread as North america, hence a lot of the gas guns are powered via common consumer sources like propane and duster gas. Airsoft guns that use a MCU (most built on top of MOSFET units) has only recently appeared in airsoft, while pretty much every electronic paintball gun has been the case since the 90's (mostly due to solenoid control), which is also a huge factor to the design.