Kaveri express for SBC-MAS ( To get some solid sleep :P ). Sleep killer for Rail-fanning at MAS, if I need to catch connecting trains at MAS. And MYS Shatabdi for the superfast experience!
SBC Shatabdi is a tad better than MYS in terms of maintenance and in general occupancy is better, but for the SBC-MAS run, I used to prefer the MYS shatabdi for it's evening departure and the non-stop run ( before KPD stoppage started).