Table of comparison of signals

Hi,

I recently posted a question about comparing two waveforms, one being a noisy signal and the other a smoothed signal by the use of Savitzky-Golay filter. I was recommended to try using Peak Signal-to-Noise Ratio, Mean Absolute Difference and Root-Mean-Square on Matlab.

Below is the noisy signal and the filters that I have applied to it.

I found when using the PSNR, MAD, RMS the results were linear as Filter 1 gave the highest value going through to Filter 5.

Using the Savitzky-Golay filter and using constant polynomial fit of 2, the five filters have different window lengths of 11,23,35,47 and 59.

Are there alternatives or any ways to quantify which best filter would be to use and end up with results in a table?

Regards