I listen to a TT2/M Scaler combo most every day in my office in a near field setup. I marvel at its ability to glue me to my chair at the end of the day to listen to just one more song.
I went back and forth with between a Sonore Signature Rendu and an opticalRendu alternating them feeding the MKII and the TT2/M using a BHK Pre to switch between them. The source was Roon. I also used a Kitsune KTE SU-2 DDC to convert USB to I²S to see if there was a difference. I personally don’t hear any difference between USB and I²S on the MKII. Others may, but I think the USB out of the Signature Rendu is quite good and may be why I don’t hear a difference.
MKII - Slightly wider image, really nice sweet midrange - Matches really well with a pair of Mullard CCA in the BHK Pre.
TT2/M Scaler - A little more relaxed, a bit more bass, a little more space around instruments.
Having heard both, would I feel the need to upgrade from the TT2/M Scaler? No. If you’ve had the TT2/M Scaler for long enough that you want a change…you have the itch, then yes. It’s enough of a change you’ll notice the difference.