Depends on how sensitive you are to the touch of the blade.
Its the same as "why are people buying T-05 and not MX-P while they are similar in terms of spin and speed?"
Some people cant even tell between ALC and ZLC, let alone big and small scale patterns on Koto outer plies.
The difference here is that the balls stays a tad longer (somewhat softer) on small scale than big scale patterned koto outer ply and the feel of the ball is somewhat more delicate too. This means better shot "quality" (as we call it in chinese) when using the same stroke and amount of force.
Came across quite a few viscarias including custom made ones, would try them first before checking for the pattern. Mostly with T05.
Also, dont bother with Viscaria now that they are renewed with the new BTY branding. I haven't seen a single one that i'd buy myself. And I've seen quite a few of them too. For some reason they are a bit heavier (most i saw are around 88/9) and feels more dull now. And the handle is more purple than before. Oh and that fugly new BTY logo on the alu plate too. Ugh.
If you're looking for something similar, id say Xiom Stradivarius (if you can still find one, that is).
Just keep in mind, using something that the majority of CNT use wont make you better automatically