The schedule of these clone trains give a very good idea what IR wishes to do with ZBTT, atleast in all high priority trains of a particular route.
Giving example of BSK clone after SPJ RR, MFP 5m halt,CPR 5m halt,GKP 10m halt(instead of 15m), ASH 5m halt (instead of 10m) and CNB 5m halt.
The halts have been reduced to minimum possible halts and similarly halt duration has been reduced to minimum possible duration.
Also...
more... pass through have been added so speed can be adjusted accurately according to route capabilities.
Like in this CPYZ and BBK are made pass throughs both to separate the slow NDLS-CPYZ section with high speed CPYZ-CNB and to separate slow ASH-BBK section with BBK-GKP section.