The difference between difficulty modes is astounding, and that corresponds heavily with the level of effort you’ll need to put into your play. There is a side-effect to Sniper’s smorgasbord of options, though. Few shooters pack so much consequence into each copper casing. It sounds like it could be cumbersome or tedious, but the satisfaction of learning the systems and, eventually, intuitively “feeling” the bullets makes it gratifying to experiment, fail, and improve. All of these factors matter, and they make each long-range shot into a miniature math problem.
If you crank up it up to “Authentic” mode, you’ll also have to contend with wind speed and direction, weapon spread, more scope drift, ammo scarcity, realistic magazines (losing the bullets you didn’t fire from a clip when you reload early), and more. And that’s just for the standard difficulty.