Originally Posted by maxpotapov
By sharper I mean strings like Dunlop Black Widow (7 sided profile), Polystar Turbo (star shaped profile) and alike. Alu Power Rough is successfully used as a cross string for natural gut, probably because "rough" texture on a harder surface actually reduces friction (it becomes less sticky or something).
I think it's just because people prefer the feel of ALU Rough to ALU. They don't feel the same.