It may not be the same with all divisions.
For an example, through there is no stoppage for Train No. 02513 between Secunderabad-Guntur, still it is scheduled to trial Train No. 12748 Palnadu Express, which is having 8 stoppages between SC-GNT.
For...
more... the sake of saving 10 minutes run time for a weekly superfast train, it is not desirable to waste 20 minutes run time for a daily superfast train (as it is not feasible to provide different time table for remaining 6 days, where this weekly train is not running).
Even there are multiple instances, where in Guntur-Macherla DEMU was not given precedence, for (so called prestigious) Vijayawada-Lingampalli Superfast Express.
Similarly, Train No. 22882 Bhubaneswar-Pune Weekly Superfast Express use to trail Train No. 57382 Narasapur-Guntur Daily Passenger, between Vijayawada-Guntur (without any precedence).
One more example, Train No. 17230 Secunderabad-Trivandrum Sabari Express, use to trail Train No. 67255 Guntur-Tenali MEMU, without any precedence (frequently use to stop at Sangam Jagarlamudi, for clearance of Train No. 067255).