I guess you have in mind GATCO EdgeMate Pro Sharpening system?
Hmmm, it is somewhat difficult to say which works better.
Both have their advantages and disadvantages one vs. another.
SPYDERCO Sharpmaker:
+ easier to set up;
+ works considerably better on long blades;
+ has awesome users manual in nicely printed brochure and on videotape;
+ can be used as conventional flat benchstone;
+ don't need any lubrication;
- has only two pre-set angles for knife sharpening;
- can waste your knife tip if you will allow it to slide from the rod when used in edge mode;
GATCO EdgeMate Pro:
+ sharpening angle is not depending on your hand, it is pre-set purely mechanically;
+ don't required constant base (like working bench or table), you can work holding the system in your hand;
+ extra coarse grit hone cuts the metal a bit faster;
+ GATCO diamond hones can be used with the same clamp;
+ better to work with convex ground blades, having more pre-set sharpening angles you can imitate convex ground edge with multi-beveled edge;
- it is a bit tricky to "catch up" the same sharpening angle from one sharpening session to another, you might slightly (but very slightly) regrind the edge each session;
- it can be tricky or even impossible to clamp up the daggers and blades with pronounced false edge.
Please don't count these pluses and minuses point-by-point, think about which of them is more important for you. The best way to choose - try to handle one and another at any blade show or store.
Maybe I missed some properties but hope it can help.
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Sergiusz Mitin
gunwriter
Lodz, Poland