Even soft steel may have a great abrasion resistance, and very hard - carbon - steel may sharpen most easily...I've found I enjoy sharpening Euros on Arks more than synthetics, and I enjoy sharpening J-knives on synthetic stones more than Arks, but I don't know the exact science. I think it's because Arks cut relatively slow, and on high hardness j-knives that can mean a lot of work for little reward. Conversely, synthetic waterstones cut comparatively fast, and on softer Euro knives that can mean you chew up metal quick if you don't pay attention. I think.
All things considered though, if your technique is solid you can sharpen on anything abrasive and kinda flat.
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