Default value of "NRMonitorLines" in "g3ruh_sm.ini" is 50 lines.
I was advised to change for higher value from the author of SCM.
So I tried to playback the saved wav file as NRMonitorLines=1000.
Then the decoded number in SCM_9k6 has increased to 47 at once.
Now, It was almost comparable to the decoded number in MixW.
Date: 14 Jun 2013, 22:51-23:06UTC
Frequency: 144.640MHz FM, 9600bps GMSK
DCD threshold: 5
Results: SCM_9k6(Ver0.10b): 47
MixW(Ver3.1.1) : 49