I run across some very neglected knives and they take me forever to bring back on my Sharpmaker. Are you saying the Lansky is quicker when you are restoring a badly blunted edge? I'd look into getting one if that was the case.
How do you control angle with lansky? I know the clamp and ramp system, but you don't really know what exact angle you get thou. For example if I want to put on a 20° edge and a 30° microbevel how do I know what setting is 10° per side (or does it go that low?).
That's great you can freehand sharpen. Accurately, I cannot all that well. As long as I keep my knives sharpthe Sharpmaker does a great job of keeping the edges. The one thing the Spyderco will not do though is put a bevel on a blade without a hell of a lot of work if it's been neglected and non-existent. The Lansky really excels at this and if you have a precious piece of steel and don't want it scratched up or an uneven bevel this system shines.
I think the diamond stones will last longer. I wore out my original lansky kit. The stone's wear away from the center.
Also, what is an "Arkansas Stone".
the holes you put the rods into have degree markings on them.
If mem serves me and I am at work so can't check for sure but I'm pretty certain you have to work with a 17, 20, 25, and 30 degree with the clamp. So I would put your 25 or 30 degree angle on it then you could micro it at 17 or 20?