Before comparing the relative cabin noise values of various aircraft, assure that the data collected was consistent. You can alter the cabin noise a lot with power and RPM, so unless this has been accounted for, the data is of little use. Does the noise value you're provided represent the typical cruise you'd like to fly? If your data is for very low power, low RPM, it won't be of much use to you if you'd like to cruise fast.
With a decent headset, I have never worried more about cabin noise, it is what it is, and a quiet jet won't do what I need the plane to do for me!