I haven’t heard the PS Audio DSD Mk II, but I had a very heavily modified MK I as I was one of those on the PS Audio Forums that made every improvement possible, including the upgraded Edcor transformers, external power supply board with a Farad Super3 Linear Power Supply, EMI protective sheeting, etc, all which made very big improvements. The DSD MK II was based on many of these improvements. When I became a T+A dealer months after, the DAC 200 easily surpassed my modded DSD MK I. That’s all I can say about that, though I know PS Audio continues to release firmware upgrades to their MK II.
I can’t comment on that particular McIntosh unit, but I haven’t been impressed with any McIntosh DAC I’ve come across.