i have travelled in this train in august last yr.off late i had a chance to board 12260 sealdah duronto.i'm just trying to make a comparison.those whho are frequent travellers in 12262/12261 can help-
1.food quality is surely better in sealdah duronto.pantry men in 12262 has a lot of catch up work to do.i agree with what a blogger mentioned few days back-mode of serving tea in 12262 in just too bad.they can take a lession out of 12260's book, where they serve hot water in thermosflasks & a tray is provided.for that pantry of 12262 will have to get those small trays & flasks.
2.toilet...
more...

door passage & wash area is carpeted in 12260.this keeps the coaches clean & dry.has they been in place by now in 12262?anyone who has boarded it off late can help.
3.speed-of course u can't blame 12262 for slower speed.its a matter of tracks.
4.cleanliness-both are equal, 12260 may have a slight edge.
5.punctuality wise 12262/12261 is ahead.but 12260 runs on a more congested route with less slack time.
as i plan to go to mumbai by 12262 next month, can anyone who has travelled in mumbai duronto help regarding these facts?