I started this game as CNJ, when I switched to ACN at level 30 to be able to unlock WHM I didn't go back except to unlock Stoneskin until turn 5 in coil.
Ever since then I've felt the SCH was gimped in comparison.

Right now in the game, it don't matter.
Most parties are geared like successful 2nd coil groups were 4 months ago.
Duh, really have to wonder why they're easy to heal?

When I played my SCH in Bryflox speed runs (when people did those) and people wanted i90 groups I actually preferred my SCH for healing those.
However I also remember when SCH were gimped in Turn 2 or even felt helpless in Titan HM.

I've spent a lot of time healing on both classes, no way a SCH compares to WHM in healing output beyond single target.
I'd give it a close vote on 4 player content but in 8 player content where the party is not over geared, no contest.