The difference there is that Haskell actually does offer some functionality and concepts that aren't really present in most other programming languages.
Ruby, on the other hand, is pretty unremarkable. It doesn't really offer anything beyond what older languages like Perl and Python, for example, offer.
I can mostly agree, Haskell's additions aren't even in the same ballpark. I also prefer Python overall to Ruby. But Ruby has a huge advantage of anonymous code block parameters.
That facilitates dsls and I believe it's important enough to note as significant.
in my experience, ruby has a lot of small improvements over perl and python that add up into a far nicer programming experience. it's subjective, perhaps, but i've used a lot of languages and i find that ruby hits the sweet spot for developer productivity.
Ruby, on the other hand, is pretty unremarkable. It doesn't really offer anything beyond what older languages like Perl and Python, for example, offer.