I like Shatter for PvE because it's more broad and combines well with bloom for group clearing.
But i like Vortex more for PvP because it's great for holding down objectives in control or denying them. And can bring alot of postmortem kills.
[b]Which is your favorite ?[/b]
-
If you're going for explosion radius (against hordes) shatter. If you're going for most damage on targets, vortex. If your target is far away, lance