Ppl that hate Vantage's Ult Can't Aim

The Wingman is a terrible choice for comparison.  The Wingman's bullet velocity is almost TWICE as slow as that of the Sniper's Mark.  Here are their relevant stats:

Wingman:  18,000 Hammer units per second

Sniper's Mark: 34,000 Hammer units per second

As you can see, the bullet velocity of the SM is almost twice that of the Wingman.  In practical terms, up to a few hundred meters, the Sniper's Mark is essentially hitscan.  The Wingman has a notoriously low bullet velocity, which is one of the primary reasons that it is considered to be a high skill weapon.  I can't quickly find bullet drop statistics, but one can extrapolate from the above that the Wingman will also have significantly more bullet drop that the Sniper's Mark.  On top of that, the SM has an indicator right there on the crosshair for compensating for bullet drop.