CV (Coefficient of Variation) and %RSD (Percent Relative Standard Deviation) are similar but not exactly the same.

Both are measures of variability or dispersion in a set of data, but they are calculated differently.

CV is calculated as the ratio of the standard deviation to the mean, expressed as a percentage. It is a measure of the relative variability of the data, and is often used to compare the variability of different sets of data with different units of measurement.

%RSD, on the other hand, is calculated as the ratio of the standard deviation to the mean, expressed as a percentage, and then multiplied by 100. It is also a measure of the relative variability of the data, but is typically used to compare the precision of a measurement method or instrument.

In summary, CV and %RSD are both measures of variability, but CV is a more general measure that can be used to compare the variability of different sets of data, while %RSD is a more specific measure that is typically used to assess the precision of a measurement method or instrument.