So Viktor isn't very good at all. His ult is really good, but that's about it. I really think that hex core passive thing holds him back, and upgrading it for 1200 seems like a waste IMO.
Wikey, Cho's Q is not meant to be used where your enemy is, but rather where they will be when you use it. It requires good prediction to be useful against remotely decent foes, but the same is true of most delayed "skillshots".
They are two champions with two completely different kits. Just cause an ability has a similar effect or the effect is "split" doesnt mean anything. That would be like saying Amumu and Dr. Mundo would be rip offs of DotA's Pudge because they all have skills shots and a AOE Toggable that encompasses them when in reality all 3 champions are very different.