Yeah I turned it on since I saw players post SS with EncDPS off while DPS is on. Not sure which one is more accurate. There is also a tab called Outgoing Damage (Ref) which include all your buffs added to the EncDPS & DPS, for me it results in 10-12 extra DPS (it is not in the SS I posted).
Edit:
Someone on reddit posted this:
Now the question is which one should we care about? In short EncDPS will be effected by boss mechanics such as conflag and divebombs while DPS won't since it is like a stop watch from what I understand (maybe I'm wrong)."EncDPS is your dps over the entire encounter (Damage done / length of the encounter). DPS is only while you were active (Damage done / active time).
Generally they should be the same/similar unless you started much later than other people or died."