does a defender emp heal better then a controller?

[mothermoy]

or do they just get their powers quicker as a defender healer?

[Prototelis]

Yes!

 

You can see the difference with PINES her designer, or use the detailed info in character creator.

[HelenCarnate]

Healing numbers mean very little.  Defenders have better numbers on their buffs and debuffs vs controllers.

[THEDarkTyger]

General rule of thumb: The same power set will always perform better if it's a primary powerset than as a secondary.