In an experiment, at feathered friend’s rep day, with Petzl, and other presented, we conducted ice screws placement test. The result I observed were unanimous. My theory is: long rigid handle creates the most torque on the starter-hole, and therefore tends to fracture and shedder the first five centimeter of the ice (the outer surface). Also the small knob (the coffee grinder handle) creates more torque (up and down movement) on the placemet therefore enlarging it and creating looser placement when compare with larger pivoting knob like the sonic’s "bolt hanger"
The worst of them were the BD (I will assume that the OP will behave the same), because they have small knob ( coffee grinder pivoting point), and low rotation angle (long stright hanger) which caused an indirect driving force on the screw. Second worst were the Petzl sonic, they preformed conciderbly better then the BD because higher angle of rotation (the force is directed more directly to the screw itself), but still due to rigid handle they were still fracturing the ice too much . The best performer, with almost no fracture, were the Grivel 360 they were the most secure placement and with the cleanest hole as well as the fastest to go in .
Anyway just my two cents