Case 1: Gatimaan is best in terms of timings, Shatabdi is too early to board from NDLS.
Case 2: In terms of Speed Gatimaan and Shatabdi are equal.
Case 3: Facilities- Gatimaan is better than Shatabdi.
Case 4: But for tourism and regular travelling i prefer Taj Express over other two, cheap pricing and upto mark timings.