I had that exact amplification chain of RP1 and ST100 and compared 3 DACs - Qutest, Brooklyn DAC 2 and Bryston BDA3. The new DACs Qutest and Brooklyn 2 took around 200 hours to sound their best (closed in, murky and confused before they settled). I ended up with the Qutest.
But I digress…the point is the Rogue set up is more than resolving enough to highlight the differences between the DACs. Are your speakers up to the task though?
Give the Pontus 200hrs of run time. If no improvement then it is what it is.
Few more things to take into consideration…
1. The best power cords should be on your source components (DAC, preamp)
2. BJC cables are decent but they’re not great. Something to consider as a potential area for improvement. They should still allow you to hear the difference.