Both are extremely similar, in their color, power, and build-up, but overall, ignoring specific circumstances, blah, blah, blah, which do you find to be the better move?
Call the Storm
POWER COST 
14
Thor summons a violent storm to smite the enemy. The rage of the heavens rains down on the battlefield, dealing 4518 damage to the target and 2259 to all other enemies.
vs
Embiggened Bash
POWER COST
12
Ms. Marvel’s embiggened fists of rage strike down her enemies! For justice! Deals 3390 damage to the enemy team.