Streamer or DDC

Question from a digital newbie, I purchased a dac with I2S input and I keep hearing and reading that the I2S connection sounds better than USB. I was considering moving to a streamer to lower any PC noise interference but now I am wondering if using my MacBook --->DDC---> dac will give me the same results as streamer with I2S---> dac. I am sure many Agoner have much more experience than me in the digital music field and I would appreciate any help I can get. Thank you and stay safe!