Yes, great idea,, they could start by comparing Mojo vs Hugo. I suggest they check them with all permutations, such as PC, Mac, hard drive running, hard drive off, solid state hard drive, dedicated music server from brand a, b, c...z, DAP from brand X, Y and Z, cable from various manufacturers, extra power supply from brand a, b or c, data purifiers and reclockers, singly and daisy chained, jitterbug, etc. etc. Who knows, the Mojo might even sound better than Hugo in 5% of the permutations while Hugo sounds better, in different ways in the other 95%...
Once that is finished check the others. Once that is finished your conclusions will be useless since by then the products will be obsolete
Seriously, I would check these things myself in my own system and that would be useful to me. How they compare in someone else's setup isn't really going to help me a whole lot.
This reminds me of a magazine review of a certain obscure amplifier. According to the reviewer it generally sounded average and was overpriced (of course he said this in a very polite and obscure way since this was a mainstream magazine that relies on advertising), but when you use a certain turntable with a certain tonearm and a certain cartridge that was adjusted just so and a particular phono preamplifier, then the thing was worthy of recommendation... Completely useless information...