As you quoted "There are many 130 SF same category Trains running in this conditions like Mahabodhi , Purushottam , Poorva etc.", I request you to please elaborate "etc" here. AFAIK, there are only 4 DAILY running SF with 130KMPH. And talking about specialty of this train, I think who must be well aware of this rule that Higher speed certified trains are given preference over the trains with less speed certified. And again I would say, there is not much fog in the region today, atleast in the peak noon time, (look at 12305's running in CNB-NDS section today, running above 80-90 KMPH).