That Worksharp "sharpener" is definitely a grinder. Looks horribly like a linisher, and I imagine it is good for profiling a blade, but will not put the fine edge on it that you would need.
If you had a number of knives that needed re-profiling, it might be a good place to start by allowing you to get 90% of the way to a finished edge in a hurry.
Personally, I'm quite a fan of the harder blade steels. Have VG-10 on the chef knife, and D2 tool steel on the folder. The folder does about 500 rabbits before getting a sharpen, and the chefs knife gets a yearly sharpen if it needs it or not. Maintenance during the year is with a ceramic steel, and sharpening is using diamond stones of various grits. I used to use normal abrasive stones, but that took ages to get the finish I was after.
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