Esoteric K-01 and EMM XDS1 side-by-side in the same system may be a rather fun experiment...
As always, and it will be sure conclusive, but for the given audio system both components (front-ends) are being evaluated. And make sure you have a really nice power conditioner or power re-generator for the EMM gear.
Of course, you are correct; it will be fun, one way or the other. Part of the "hobby", right? :-)
Best wishes,
Alex Peychev