They have the exact same effects. The just have a different animation. If someone is point blank while being pebbeled by a sage they will still attack.
Immobilize != stunned.
Well if you plan on going DPS then you just got rid of your bread and butter abilites. So, good bye DPS. A Gunnary w/o Grav Round is worthless.
The only time to use a rifle is as a combat medic, but even then, not suggested.
I don't see why everyone is getting so butthurt over this post. They are very similar. It's a fact. Similar play style, similar rotation, similar move effects, etc.
It's not a bad thing to be similar. It's a simple observation.