Taking back my words happily ! :) Both have an avg. spreed of 70 KMPH but peak observed spreed of NJP Shatabdi is 130 KMPH in HBC ! Whereas Pune-SC Shatabdi is not showing any peak observed spreed between two cities. Only for this I mentioned here "The fastest diesel hauled Shatabdi.....".
Thats all ! Yet I've no intention to quarrel upon this fact & above all Godlike railways ! :)