First off, I heard the regular Adventurers can do a quest to get the Cygnus Knight skill. Is this true?

If so, what's the difference between a regular Adventurer and a Ultimate Adventurer other then the UA has less hp and can wear equips 10 levels sooner?
Having less hp and wearing equips 10 levels sooner isn't really "ultimate".

Can other player see that you are an Ultimate Adventurer not just a Adventurer with the skill, so at least you have some bragging rights?

you get a sexy medal, some free items which are good until you can equip your endgame stuff, and you don't have to do the multiple-hour long quests that normal adventurers do in order to get the CK skill

UA's usually end up stronger than regular. 120 CK = Max Buff as well.
lvl 60/80 stuff that are free (which is good till end game, BEST if you want a/an XXXless class)

Thanks. That medal makes it all worthwhile.

u look hawt