I'm trying to go into this without expectations and will be sure to take notes on familiar songs before and after.
The fact you started a thread here is proof that you are going into this venture with expectations. Unfortunately, expectation bias is practically impossible to circumvent.
My bet is you’ll hear a notable difference, at least the first time you fire up the new DAC. Later, conduct a level-matched comparison between the WiiM and your new DAC. If you go into it with true objective intent, you will likely be surprised by the outcome.