Hello @barts
I've accumulated about 5 different brands of low cost, aftermarket fuses (I'd never pay what SR charges, but that's just me) and in my Marantz PM-15S2 and SA-15S2 SACD player there was a distinct difference with all of them, directionally and in comparison to the bog standard ones. With my Kinki EX-M1, I could hardly tell the difference so I kept in the standard fuse that came with it.
The "sound" when in the wrong direction always rolled off the highs, muted ambience, and gave an out of phase shading to the sound making it harder to locate placement on the soundstage, or kind of a slight blur. If one didn't know, they'd be content with the sound and attribute it to some house sound (like warmth or richness). In the proper direction, everything snaps into place, the highs extend more and ambience is restored, along with better definition and detail. That's been my experience with every fuse I've tried with the Marantz gear, but not the Kinki.
All the best,
Nonoise