That's interesting...But when it comes to SCR AC duranto which is Secunderabad-LTT fare for 3AC 860 rs where for superfast VSKP-LTT between SC-LTT it is 817 rs. So total difference 43 rs in 3AC. But you will water bottle, Breakfast, Tea/Cofee and a new paper for 43 rs. Also its run 2 hrs quicker than SF....