I find the Gatco Micro-X handy to carry in my bag, though at home all other sharpening gear has been abandoned to the Sharpmaker - well, except for axes. I still use files and stones on axes.

If people find it useful information, a while back I wrote Gatco asking for the angle of the Micro-X. The answer was 25 degrees.

So:
RSK Mk1 as shipped: 15 degrees
Sharpmaker per instructions: 20 degrees
Gatco Micro-X: 25 degrees