This is from KCG. If SC is considered AP Smprk is the faster among all apart from Rajdhanis'
12649 Karnataka Sampark Kr... SKr SWR KCG 1 08:35 +7 NGP 1 17:05 +17 8h 30m
12975 Mysore-Jaipur SF Exp... SF NWR KCG 1 02:15 +9 NGP 1 11:05 +41 8h 50m
12707 Andhra Pradesh Sampa... SKr SCR KCG 1 16:50 +11 NGP 1 02:00 +16 9h 10m