Neither of those blades is like an inner Viscaria or an outer w968. Most inner fiber blades on the market use an Ayous core, outer fiber blades use a Kiri core. Kiri is softer and lighter than Ayous, so on outer fiber blades that balances the feeling caused by having the fiber close to the surface. If you build a inner Viscaria, exactly with the same structure, you will have a substantial power loss. And by power I don't mean just speed, I mean the spin/speed ratio, mostly further away from the table. On the other hand, outer fiber blades with an Ayous core can get too hard, especially if you use a thick medial layer like on the w968, or A-C (which is not ALC). So, to make those compositions more "user friendly", some changes need to be made.
My most popular composition locally, used by some very good players, is a inner blade with a Kiri core, but usually I make it thicker and use a denser composite to compensate for the loss of power.
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