Thank you for the answer. It clarified some things
Let me clarify some of my questions:
"What's the difference in the way that you behave (with eg AWP) vs having an XEM?
Is it a close feeling (using an AWP) as using scope at every time you shoot with the XEM (to simulate the snper's feeling) and keep playing the same way with the same tactics? Or it is an entirely different game?"
eg. With an XEM (or any other of the guns I use) I chase the enemy, I run around trying to surprise him and if I am one-to-one I even go to fight him "face-to-face" (indeed I use the scope only in long/mid ranges or when camping), running from spot to spot, and in short, I play "agressively".
When I equip a sniper rifle, I fall back, camping a lot, avoiding running around, using only a few spots that I know I have the advantage of long range, and waiting for the enemy to come to me, hoping that he will come from the right direction. Many times I use the scope even when the enemy is not in sight, if I think I know where he will come from. In short, I play "defensively."
My question is: Is this the right way to equip a sniper rifle? Or I should behave the way I behave with an XEM (aggressively), without fear of running around, and using the scope only if I actually see the enemy (as I do with an XEM)?
Also, when running around with a sniper rifle, should I use wolf form or equip pistol, or just run around with AWP and learn to snipe fast? Should I pistol switch and back to AWP again after each shot to reload faster?