An unfortunately map bug in Team Fortress 2’s map “2fort”, allows the RED sniper to have an unfair advantage over the BLU sniper. The right side exit onto BLU’s sniper deck, has a small crack able to visibly see the feet of on coming enemies. Here are screenshots showing the disadvantage.

BLU SIDE:

RED SIDE:

As you can clearly see, this is something that is a huge disadvantage for exiting BLU opponents.