Lower output offset voltage (15mV vs. 30mV for the NCP2890) allows lower click-pop levels than the NCP2890.
Higher Power Supply Rejection Ratio (73dB vs. 64dB for the NCP2890) helps improve sound quality.
Higher Signal to Noise Ratio (100dB vs. 77dB for the NCP2890) allows the amplifier to have a lower noise floor and reproduce low level audio details better.
Benefits of the NCP2890 over the MAX9716:
The NCP2890 has a wider supply voltage range (2.2V to 5.5V vs. 2.7V to 5.5V).
The NCP2890 has lower quiescent current (1.7mA vs. 4.3mA).