Which device makes for a better digital music source? Computer or streamer?

I have been using a streamer for both my audio systems. A buddy of mine uses his Macbook Pro and software as a source for his audio system. I use Bluesound Node2 in one audio system and Bluesound Vault with the other. Each has an external DAC attached. My Ipad is my controller. Which source has the potential to yield the best sound? The computer as a source or the streamer? What are you using?