A classic scenario: You have a railgun. You turn your turret slowly and find your next target. As you scan the battle, a shaft's laser is suddenly upon you! Who will win?
Both have the same hull, you choose, but there are no power-ups.
Here are some things that might change your mind:
Shaft has the greatest damage in one shot out of all the turrets. Shaft has the slowest reload time when compared to other turrets in their modification category. Railgun needs to wait a little before it hits. On the contrary, once you release the space bar, the shaft can shoot.