One of my recent games in S2 was as Vlad playing against Viktor. The first thing I noticed, however, that they were in fact pretty similar to each other conceptually, but the problem was that even at level one I could trade Qs with him and would always come out ahead. Not to mention the fact that it was easy to tell he was trying to zone me from minions with Death Laser and that it being a skillshot means it would be easy to dodge. But that's another story.
What I'm suggesting in this thread is a slight buff to the base damage of Viktor's Q, considering he can't even match Vlad in lane.
Let's compare at the numbers:
Viktor Q:Viktor sends a device at an enemy unit to blast them for magic damage, which then returns to him granting a shield for up to 3 seconds with an amount equal to 40% of the damage dealt before reduction.
Magic Damage: 80 / 125 / 170 / 215 / 260 (+ 65% AP)
Shield: 32 / 50 / 68 / 86 / 104 (+ 26% AP)
Range: 600
Cooldown: 9 / 8 / 7 / 6 / 5
Vlad Q:Vladimir drains the lifeforce of his target, dealing magic damage and healing himself.
Magic Damage: 90 / 125 / 160 / 195 / 230 (+ 60% AP)
Health Regained: 15 / 25 / 35 / 45 / 55 (+ 25% AP)
Range: 600
Cooldown: 10 / 8.5 / 7 / 5.5 / 4
Vlad's Q has higher base damage but lower scaling, but he is considered more of a lategame champion because of his ultimate giving him damage amplification on all his spells AND all his allies. Viktor's Q, on the other hand, has lower base damage but higher scaling, but is meant more for early-mid game because of his long-range harass with E, crappy passive which I hope Riot will remake soon and that he builds more defense as an AP carry than most others build offense.
This is in addition to the fact that Viktor's Q has delay for both damage and shield, while Vlad only has delay on healing and his Q damage is instantaneous. So this means that Vlad can trade a Q with him while Viktor's Q is en route to Vlad, or even wait till the shield wears off to drain him again. This means that Vlad has more zoning potential.
But Vlad doesn't regain health as much from one Q as Viktor gains from shield right? The problem again is that shield is only temporary HP and is only used for defense, while Vlad does relatively the same amount of damage while regaining permanent HP, which is also recycled to fuel his other spells.
They have relatively the same range and at level two the same cooldown period, so no problems there. I ran 21/9/0 masteries and Mpen marks, HP/level seals, AP/level glyphs and Flat AP Quints in my game for reference.