I think they are for different playstyles. If you seek to attack everything as soon as possible and you live from your own strength then W968 is better suited. If you have more of a passive, blocking, countering style on top of the table then Viscaria would be better. Of course you can use both blades for everything but their focus is a bit different.
In my view the Viscaria is a harder blade to control and offers much quicker and sharper response than the W968 - so harder for a beginner to use.