True, but you aren't messing around with exotic particles. This vastly simplifies the entire process and reduces the losses in conversion (as there are less converions
).
Also although the total energy is the same, the peak would be lower. A 100TW beam would need a 100TW reactor to power it when it's firing. A magneic accelerated railgun slug builds up its KE over the course of its acceleration. So a 10TW reactor powers the magnets for 10 seconds and you've put the same amount of power into the final weapon, but with a reactor 10 times smaller. Or you use the same size reactor and get a 10 times more powerful weapon.
