Unless you consider which colors are being converted (RGB archangels only convert light and dark, which are the "unresisted" colors), the RGB archangels have objectively better active skills than the Heroes because of the heart enhance. That leads to either better healing, or less need to enhance orbs after a heartbreak.
I always considered that to be the reason why they had less Awoken skills than Heroes previously, but now they make really heavy hitting subs. Michael and Uriel got a flat 500 ATK boost, which alongside their three rows makes them far more capable of destruction than Heroes. As subs, rather.