Help me compare Reaction Commerce and Magento=

I’m running a website built up by Magento. I’ve heard people said that one can replace the other among them. Please explain by helping me compare these two platform.
Does Reaction Commerce support extensions like Magento 2 One Step Checkout ?
Thank you!

Hello all, I have the same question but with the following extensions
Hide price for Magento 2
Magento 2 Quick view extension
Can anyone help us with those questions?