Silicon carbide vs. Aluminum Oxide belts?

[wvdavidr]

Which are better for sharpening- Silicon Carbide or Aluminum Oxide? I know Si/C are 'harder,' but that can have advantages and disadvantages.

 

[Jason B.]

Ceramic, like Norton Blaze

 

[HeavyHanded]

Honestly, for actual sharpening the diamond belts work better than either if your grinder runs at a slower speed. For surface finish work the silicon carbide are great, for shaping and regrinds the Blaze belts are fantastic.