Electronic Communication Systems 2nd Edition by Roy Blake

Exercise 16

SSB transmitters use Class AB power amplifiers, while AM transmitters generally use more efficient Class C circuits. Suppose that 100 W total dc power is used to power the final stages of each of two transmitters as follows (for the AM transmitter, the 100 W includes the power supplied to the modulating amplifier):
Transmitter 1: Full-carrier AM. The modulating amplifier is Class AB with 70% efficiency, the final amplifier is Class C with 85% efficiency, and the modulation index is 75%.
Transmitter 2: SSB. The RF power amplifier is Class AB with 65% efficiency.
Which transmitter will produce a better signal-to-noise ratio at the receiver By how much