WA - Warrior [ High def, solid attacks overall tank ]
BL - Blader [ High def rate *Dodges attacks* and his crits are powerful ]
FA - Force Archer [ The healing class of the game. Also stands it's ground in PvE ]
FB - Force Blader [ De-buff master, good looking skills. An overall menace ]
WI - Wizard [ I'll let Takolin tell you bout this

]
FS - Force Shielder [ Capable of either using sword or magic skills. HIGH ASS DEF ]
Such a small list.
My improved comparison
Warrior: What you see is what you get. A guy in armour with a giant sword. The class which has the highest HP in the game, has a great attack and nice def. The only downside would be the lack of defrate in PvE, but most warriors can tank enough to ignore that issue.
Blader: It's a disturbed copy of the warrior. It doesn't deal as much raw damage, but they make it up with crits. HP and attack are still nice. Their def is lower than that from a warrior, but going heavy solves things. Their ownage def rate is great in PvE and mass PvE when combo'ing starts becoming useless if you all attack the same target.
Force Archer (FA): At the first sight a glorified walking HP pot, but looks deceive. These babies can be lethal, when they aren't forced to heal.
Force Blader (FB): If you can't play with it, the class sucks. If you can play with it, it's beyond good. One of the most annoying classes you'll face in PvP with their nasty debuffs. To be honest nasty is an understatement. They can disable all classes but a wizard in a PvP for 10 seconds making you a sitting duck who can't move and can't use skills.
Force Shielder (FS): The critwhore. It has the advantage of going both magic as melee and both are lethal. Their damage might not be the highest if you don't crit, but when these babies crit, you'll see high numbers flying around and they crit a lot. And they have the highest def in the game. The perfect tank and their buffs make them even better tanks with either around 2k def at the cost of being unmovable (nice for melee classes and PvE) or a buff that absorbs 4k damage before you can touch their HP. My 2nd favourite class
Wizard: This was/is and always will be my personal favourite. It's a bit nerfed but it's fun nonetheless. You'll lack def, but high def rate helps in PvE. A nice selection of stun skills in PvE and great DPS in PvP. With the correct gear it's one mean killing machine and not a glass cannon unlike most wizards in mmo's. In PvE you'll AoE stun while leeching back the HP you lose in seconds. And it's the fastest class in the game who has 2 teleportat skills which makes it impossible for other classes to get you if you're running.