even hyderabad-howrah east coast express is taking only 6 hrs 10 min in between secunderabad - vijayawada and
this also takes 6 hrs 5 min to travel then there is no difference between superfast and normal express
this train has a huge loose time after crossing khammam
khammam: 22:40
vijayawada:...
more... 01:00
normally it comes to khammam with a delay of 10 or 15 min only from there it may take around 1 and half hour only to reach vijayawada
why
to maintain a difference between normal express and superfast they should have to reduce the loose time
especially for charminar and padmavathi express
padmavathi too takes 6 hr 0 min from secunderabad to vijayawada