Rockaroo vs. Mamaroo

I have a mamaroo for my 2 week old. He HATES it. He screams every time I put him in it and turn it on. I've noticed he likes his rock n play that rocks back and forth much better. He sleeps in it at night and I'm not lugging it up and down the stairs every day when we have a mamaroo we don't even use downstairs. I'm thinking about getting rid of my mamaroo and getting a rockaroo.