Believe @nomorelandings has history of development of UD-701 correct.
Saw thread on musetec-005 that you pointed to. Got my attention. Rave reviews.
Lack of compatiblity with MQA and relatively new, unknown manufacturer without a US distributor give me hesitation.
I listen mostly to Hi-Res via Quboz but once in a while the MQA version on TIDAL sounds better.
Can't say that I have a lot of technical expertise but did spot that construction of circuit boards in Musetec unit is different from others. Cicuit board material is different- looks like a black foam board as opposed to typical stiff, green circuit board and connectors look plug-n-play as opposed to custom built.
But to repeat I am no engineer or technician so I could be and very possibly am off-base on last comment.