Mamaroo AND the Rock and Play? 🤔

Loren
I had my baby shower this weekend and the hostesses all went in together and bought me a mamaroo. I'd heard great things but I didn't register for one because they were so expensive. I had the rock and play registered instead. Well, I ended up getting the auto rock and play from someone else, as well. So now I have both. My question is, is there really any reason to have both? Don't they kind of serve the same purpose? I'm trying to decide if I should return the rock and play or keep it. I don't feel right returning the mamaroo because they put a lot of thought into this gift and spent a lot to get me this thing, so that's not an option.
Also, if it matters, I know a lot of moms use the rock and play as a bassinet for the first few months, but I already have sleeping arrangements for the baby so I probably won't be using it for that purpose. 
Any insight would be great!
***UPDATE: thank you all for your responses!! To answer one question, yes we do have a two story house, but our master is on the main floor so that's where we get ready. Nevertheless I have decided to follow everyone's recommendation and keep both. I think I like the idea of a more portable option than the mamaroo to lug around the house. And I never really thought about the fact that my baby might hate one or the other. Thanks, ladies!!Â