Which is better on Carnage 2× zeus or 2x trident?

Zeus is better.

I suggest dual Zeus as it's what I have. Love mine.

Both are good choices. The Zeus is probably slightly more optimal but it really is more a question of playstyle and preference.

I've long enjoyed my Tridents.  The idea of dual Zeuses sure sounds sweet.  Unless you're hard up on other rockets options I'd say go full olympian

I must apologize for not posting this as well. I could not stand the amount of time I had to be exposed, slooooowly (relative to other in game weapons) firing off those three rockets. Carnage is a hit and run, glass cannon monster. Standing around, even if only for a trident, trading blows is not ideal or optimal. I completely understand that others love their trident carnages, more power to them, but I just cannot stand waiting around for all three of those trident rounds to launch and then the 12 second reload (that's actually 15 seconds if you include the firing time).

I completely agree with u that's what I feel and I hv decided that I will go for 2 zeus.

Twin Zeus can inflict more damage, but I think it makes you more of a target. The great thing about Tridents, as opposed to Zeus and Trebs is that you are less noticed. If I see a Carnage with lightning bolts coming out of it, I make it my mission to take it down before the spread of damage over all my teammates causes us to lose the battle. It does seem pretty clear that from all the opinions though that, if you can afford the Zues combo, it is preferable.

I love them both, and switch out regularly. Each has its strengths and weaknesses. Hard to beat that splash damage from the Tridents when it comes to popping Britbots, and it's fun to watch other Carnages or Ancile-toting bots scurry as fast as they can to cover when I'm packing two Zeuses.

Fun times.