Rails is good, but the ecosystem beyond Rails is better in many cases.
I don't know if it's the library itself or the documentation contents or the documentation website theme, but it jives absurdly well for me. I also really like the simplicity+flexibility of the library itself, and have yet to find anything even close to it in the c# or c++ world.
So, yeah, although there's less gain, there's less cost, and you might come across patterns you can transfer.
Python is a pervasively procedural (to the extent that it likes hiding OO features behind procedural interfaces), statement-oriented programming language with multiple-inheritance style OOP, and a structural aversion to functional idioms.
Ruby is a pervasively OO, expression-oriented language, with single-inheritance + mixin OOP, and an affinity for functional idioms expressed through fluent OOP APIs.
Ruby is very much not redundant with Python.