Is there particular reason to use it over Python even in web use cases? I'd say it's pretty arbitrary, choose what you know, or on the basis of the main library or two you'll need to use.

I've worked in a Ruby/Rails team within a mostly Django company.

Sure it's not fair to compare mostly Django to mostly Rails.

However our team was tasked most things that had a higher complexity but should be done rather fast. I think Django slightly limited their flexibility for business logik that doesn't follow their standard pattern. This is all anectotal however. The reason I prefer ruby is simply because I like it more.