PWM hobby servos and serial bus servos share nothing but a three-wire connector. A bus servo daisy-chains, reports position back and can run as a continuous motor; a PWM servo takes a pulse and goes quiet.
9g micros and clutch PWM servos, IP67 metal servos to 35KG, and ST/SC/CF serial bus servos (2.3kg to 120kg.cm at 24V) — protocol matters as much as torque rating here.