The best and better performing dedicated streamers outperform any known consumer over the counter computer including cost-no-object Mac. Search results on this subject including appropriate AB tests supports this opinion and I've never seen any reliable information to contradict it.
Under my definition for best and better streamers I include a custom DIY based on Amazon's Mele computer (about $1k,) the Resonessence Fluvius (RIP, last SRP about $1700,) the current Infigo IS-1 ($5k and $7k versions,) the $20k Antipodes K50 and $30k Taiko Extreme. I own the first 3 streamers listed; a person I know well in Europ AB tested the Mele/Antipodes/Extreme. The Mele takes considerable knowledge to assemble and run. The Fluvius is Android based with let's just say not-ideal library function (one of the main reasons it sounds so good is because it's not Mac nor Windows.) I'd exclude Aurender models @ $12k and below.