Jedi Knight(Sentinel and Guardian) – Mainstat: Strength. Guaridans have the possibility to be tanks and dps. Sentinels have the possibility to be dps.
Jedi Consular(Shadow and Sage) – Mainstat: Willpower. Shadows have the possibility to be tanks and dps. Sages have the possibility to be healers and dps.
Trooper(Vanguard and Commando) – Mainstat: Aim. Vanguards have the possibility to be tanks and dps. Commandos have the possibility to be healers and dps.
Smuggler(Scoundrel and Gunslinger) – Mainstat: Cunning. Scoundrels have the possibility to be healers and dps. Gunslingers have the possibility dps.
The Imperial mirror classes are as follows. Sith Warrior(Marauder and Juggernaut) for Jedi Knight. Sith Inquisitors(Assassin and Inquisitor) for Jedi Consular. Bounty Hunter(Powertech and Mercenary) for Trooper. Imperial Agent(Operative and Sniper) for Smuggler.
I can update for a gearing specifics later on if wanted and needed.