Even if you would rate the languages themselves equal to one another. The ecosystem of Python is several orders of magnitude larger. Anything you want to do has a python module or an example. I think the real question is, is it really worth giving up all that for two minor improvements in syntax.
As a Rails dev it's extremely rare for me to need some functionality that Ruby doesn't cover. If you're doing standard web development most likely you're gonna be fine with Ruby. I've been doing this with Ruby for around 8 years so I bumped into quite a few use cases...there are gems for all the standard things.
But yes outside web - data science, web crawlers etc...Python has the clear advantage.
