and another question: how is the damage output of a sigil knight in pvp and pve? is there a GREAT INSANE difference between tyr warrior and sigil knight dps??
Damage output of an awakened knight is much higher than their blue tag counterparts assuming equal buffs. You can spam skills without really ever running out of attack skills to spam. It is not however a good damage dealer class compared to the other awakened classes, and if you want that, avoid playing a knight. I'm positive there is a GREAT INSANE difference in dps, especially since a warrior can use a pole. They play completely different roles; a knight is more of a utility support fighter while a warrior is designed specifically to kill.
PVM: knight requires some of the most effort of any class. Only healer compares. The new grouping dungeon, harnak, requires some of the most effort in targeting I have ever seen in this game outside of pvp. It's a fun job if you want a class where you have to concentrate very hard. If you want a relaxed class, pick warrior, trust me.
PVP: no opinion as of yet... the knight chain is pretty unreliable though
necessity: knight is much more desired in pickup groups than warrior. It's not even close. But if your regular group already has a knight, you probably aren't going to be wanted at all.