All other things being nearly equal ( often the case in SS amps ), 200 watts power is usually better than 100 watts as it will be less likely to clip as source material becomes more challenging. A doubling of power is usually required to make a perceptible audible improvement.
Transients in music can be challenging even if the average sound level is quite low...this is why a more powerful amplifier or an amplifier with more transient headroom can be better even at low levels.
An inefficient speaker with a difficult and bumpy impedance curve can also complicate matters. Amplifcation needs to be appropriate for your speakers. Damping factor is usally higher in bigger amplifiers...this will better control your drivers and reduce distortion.
A small amplifier when overdriven can destroy speakers many times the rating of the amplifier.
Transients in music can be challenging even if the average sound level is quite low...this is why a more powerful amplifier or an amplifier with more transient headroom can be better even at low levels.
An inefficient speaker with a difficult and bumpy impedance curve can also complicate matters. Amplifcation needs to be appropriate for your speakers. Damping factor is usally higher in bigger amplifiers...this will better control your drivers and reduce distortion.
A small amplifier when overdriven can destroy speakers many times the rating of the amplifier.