Both versions include retaining spring. The Ceramic also includes a split pin. If you calliper has a screw (such as HB427-M) rather than split pin, retain the screw.
The "ears" pads are slightly wider than the Rectangular "Logan" 4-Piston Brake Pad (Shimano D02S/D03S), making them a more appropriate fit than the "Logan's" where callipers are designed for the additional width. The "ears" help retain position within the calliper.
Teverun Fighter Supreme initially adopted the HB427-4S calliper with a finned pad (shown in first image). Those pads adopts the shape of the Rectangular "Logan" 4-Piston Brake Pad (Shimano D02S/D03S), but with a heatsink which differs in appearance to the NUTT Finned pads). Later models across the flagship / higher end models (ULTRA, 7206R etc) adopt the HB427-4M calliper with this "ears" pads, shown on right/below.
Those running TurboBrake systems typically do not get a lot of noise out of the All-Metal as the HB427-4M has good heat management and the Wave Slotted rotor design which helps hot gasses escape.
Hall Sensor suits TurboBrake and Zoom levers including Dragon/Langfeite models of Predator, Hurricane, Slayer, late Cyclone, Lightning V2 & The Beast, Teverun Fighter series, models of Kaabo Wolf, Mantis Pro and select VSETT / Zero.