There is and idiom "Example is better than precept".
Please see the attached TT of both Durontos in the last one month(From Feb 17 2015 to March 17 2015 & Feb 16 2015 to March 17 2015)
1 BCT NDLS Duronto --------- Usually hauled by WAP 5 offlink WAP 7 rarely seen with WAP 4/WAP 4E
2 SDAH NDLS Duronto------------ Permanently hauled by HWH...
more... WAP 4 since the year 2013(Prior to 2013 hauled by GZB WAP 5 and GZB/HWH WAP 7)
I think everybody can now get the answer that which Duronto is better in the area of "PUNCTUALITY".
Attached TT of past One month
1 BCT NDLS Duronto
2 SDAH NDLS Duronto