static discharge vs ball lightning
Try City of Data for some numbers
It doesn't have the data for Static Discharge, but for PvP, mu lightning is more effective as it is a single-target attack, and gloom is better for PvP than Mu Lightning. AoE attacks are near worthless for PvP because the bulk of the damage is divided among multiple targets. If you're thinking of taking an Elec/Elec/Mu brute pvping, don't.
As for PvP, the end drain on Mu or Electric attacks are negligable (way over-nerfed), so if you're thinking of making a sapper for PvP, it's better to look at a Kin/Elec corr or even better, a defender. My elec/elec/mu cannot sap anything quickly in PvP, and since one dies before finishing the sapping process, it is pointless.
Ball Lightning is a ranged AoE. You attack a target, and it's the focus point of the attack. Your target and everything around it takes damage.
Static Discharge is a Cone, so the damage is given to the target and everything in a line between you and it, as well as things to the left and right of the straight line based on an angle which extends from your character to a bit beyond your target. It seems more complicated than it really is, which I blame partly on my explanation. I believe that Static Discharge has a shorter range than Ball lightning.
Damage-wise, I'd guess that Ball Lightning would be higher, but it also has a higher recharge. I don't have the numbers, and am lazy.
Looking at them both in Mids' Hero Designer the compare like so:
Ball Lightening - Recharge: 32s, Damage: 42.2(some of which is Damage over Time), Range: 80, AoE, -100% Recovery (4 seconds), -1.25 Endurance, cast time 1.07 seconds
Static Discharge - Recharge: 24s, Damage: 45.7, Range: 40, Cone, -100% Recovery (4 seconds), -1.25 Endurance, 4.29 Endurance to self (10% chance), cast time 2.07 seconds
Both have a Endurance cost of 19
So SD does more damage, recharges quicker, does all its damage up front and gives a chance to increase you endurance BUT has a shorter range, is harder to hit multiple targets and takes longer to cast
id like to know the pve and pvp effects of both Mu Epics so I can compare. Ive used ball lightning alot moderate damage targeted aoe and decent end drain. How does static discharge work? Pbaoe? Hows the damage vs ball and the end drain?