There will only be a 10 log (130/100) = 1.1 dB difference between those receivers...not really much of a difference. You can start to really hear a difference when you start talking about 3 dB (100 watts vs 200 watts) differences between the same line of receivers/amplifiers.
"Loudness discrimination:
Minimum noticeable changes in loudness vary from about 0.15 dB to about 10 dB, depending on the type of signal. 3/4 dB to 1 dB is probably a practical increment. Loudness is a tricky parameter for carrying information, since our perception of it is very sensitive to context, and we have poor memory for loudness levels. 3/4 to 1 dB discrimination, over a 60 dB range, suggests 45-60 discriminable loudness levels. " from: http://people.cs.uchicago.edu/~odonn...erception.html
"Loudness discrimination:
Minimum noticeable changes in loudness vary from about 0.15 dB to about 10 dB, depending on the type of signal. 3/4 dB to 1 dB is probably a practical increment. Loudness is a tricky parameter for carrying information, since our perception of it is very sensitive to context, and we have poor memory for loudness levels. 3/4 to 1 dB discrimination, over a 60 dB range, suggests 45-60 discriminable loudness levels. " from: http://people.cs.uchicago.edu/~odonn...erception.html