On paper swarms seem to be aible to pump out more shots much quicker but in reality its the opposite.

Assault forgegun charge time: 3s and the operation lowers it by 5% per lvl which means the charge time is 2,25s

swarm launcher lock on time: 1.4s and the operation reduces that by 5% which means it needs 1,05s to lock on.

This looks nice on paper but however the missiles have travel time and the firing animation is aswell longer then on a forgegun. The forgegun has allmost instant damage application and bigger range and you can hold down the button and the weapon keeps charging/firing. So for example when i fire my swarms at a target like 100m away the forgegunner allready hit for the 2nd time. Additionally swarms can be evaded when they are still a bit away from you. The only way to lower the gap would be to increase the flight speed of swarm missiles.

Coming from someone with Maxed Skills, Forge Guns aren't stronger than Swarms unless your fighting an ADS.

Though the SL (like the Plasma Cannon) is very SP Intensive compared to the FG.

The lack of ammunition on the SL forces you to get the ammo capacity skill.

I think that's what he means.