Apples and oranges. Different power ratings, different curcuits, different configurations.
I have the Baby, and it is quite good, especially with a good power cord. However, it's just a power amp with one input and a volume control. The PrimaLuna has a preamp section onboard--you can even order it with a solid-state phono stage.
If you are shopping for an integrated (one "box"), then the PrimaLuna is your best bet. However, if you think that you might be adding a preamp later (or you just have one source anyway), the Baby might be worth a look if you have sensitive speakers (I'd say 92 db and up). It's also just so dang cute!
I have the Baby, and it is quite good, especially with a good power cord. However, it's just a power amp with one input and a volume control. The PrimaLuna has a preamp section onboard--you can even order it with a solid-state phono stage.
If you are shopping for an integrated (one "box"), then the PrimaLuna is your best bet. However, if you think that you might be adding a preamp later (or you just have one source anyway), the Baby might be worth a look if you have sensitive speakers (I'd say 92 db and up). It's also just so dang cute!