No, you cant cause they are not the same characters, which means different abilities; and they have a perk that's not in the game yet, so that means different builds.

We can, however, determine the usefulness of the [b]exotic[/b] perk, because it is currently in game, class means very little.

Class means a lot cause the classes dont play the same. Ex: a defender doesnt play like a gunslinger which doesnt play like a voidwalker. On top of that, we're getting a new subclass, and we dont know how the new gear will work with that. Also, we dont have the 'pick up orbs when super is full to cool down melle' perk yet, which i think is gonna be key when people setup their builds for titans wearing this helm. Look, i get it, these perks didnt wow you nor knock you off your feet, but until you actually get a chance to experience them, you cant judge how effective/useful they are.