I think the problems were fixed in the recent TIDAL app update.

It should now be possible to run Explorer 2 in two modes:

a. MQA passthrough (Explorer 2 does all the MQA decoding) and

b. non-MQA passthrough (leave passthrough box unchecked, TIDAL now does first level MQA decoding, Explorer 2 unfolds the next level to 24/192).

Both options will light up all lights on the Explorer 2 on 24/192 MQA material.

This should give a like for like comparison on the abilities of TIDAL app decoding versus Explorer 2 decoding. At least I think this is the case - Joel may comment further.

In your test, does the Explorer 2 outperform the Moon 750 DAC on non MQA material?

Streaming: Roon, NUC, QNAP869 NAS
2ch system: dCS Vivaldi, Audionet Stern, Audionet Heisenberg, Magico Q1
Retro system: 101/104/105, Red Rose Spirit