Ocaml is a bit easier to reason about w.r.t. performance (time/space complexity), and the code is a bit clearer if you're coming in cold after not having seen parts of a codebase for a while. Spent ~10 years at a Haskell shop, and currently at an Ocaml one, and was a Standard ML hacker prior to the Haskell job. Done some F# in there too, although for the most part that just feels like ocaml w/ some cleaned up syntax and a nice interop with the rest of the .net ecosystem.

From a nontechnical perspective, some changes in the Haskell community and ecosystem also turned me off on it starting around 2011, and I find the ocaml one to be a bit more up my alley.