The only advantage I can see on that is if you went out to ramp as the T, if you got into the CT was retaking from B tunnels otherwise its your choice.
On another note. I have been running this pistol take setup for CT mirage.
2 A 3 B
On A, one plays triple stack watching connector one plays on stairs/sandwich watching palace and keeping an eye on ramp. If they push ramp you have both guys in decent spots to watch it.
One plays short, one plays site watching window and one peeks b apps jumping from truck.
Weapon distribution is up to you I like to have a guy buy smoke on B incase the spotter sees someone, and he drops a p250 or a five seven for someone with armour.