For lifespan, Elixir definitely saves you time between changes. Though I would also argue that I like their tone a bit better than Ernie Ball's.

[br]They just kinda feel cleaner and are smoother to play. To me, I've always thought they had more warmth to their tone, which I really like.

In my experience, it's hard to beat Elixir. I cover a lot about both brands in this piece: https://www.guitarchalk.com/best-guitar-strings/

Hope it's helpful.