Special-effect pigments provide a change in colour with viewing and illumination direction and a complex texture (goniochromatism). However, the measuring of colour differences involves a new challenge, but the quality control departments need standardized formulas for colour differences measurements. Nowadays, the last colour difference formula proposed by CIE is the CIEDE2000 colour difference formula, but this formula was designed for solid panels. For this reason, recently, two formulas have been proposed for goniochromatic colors: AUDI2000 and dDNA. Thus, the main objective of this work is to evaluate the correlation between both colour difference formulas in order to evaluate if both methodologies are equivalents. A total number of one hundred samples were evaluated divided into ten groups regarding the colour center. For each dataset, a master panel was defined in order to compute colour differences respect to that reference. The samples were measured by the BYK-mac i multi-angle spectrophotometer. After that, dDNA and AUDI2000 colour difference was calculated to compare both algorithms by considering the criterion of pass/fail. On the other hand, a visual experiment was designed. The visual experiment was carried out by direct comparison of colour pairs in a Byko lighting cabinet for the six measurement geometries. 30 colour pairs were selected among the data for the visual experiment. The observer’s task was to estimate the colour difference in a colour pair by giving values from 1 to 3. Each observer performs three repetitions in sessions of 20 minutes. Finally, STRESS parameter was used to evaluate the performance of both methodologies. It was proven that AUDI2000 was significantly better than dDNA. Furthermore, observers did not pass any evaluated colour pair while dDNA and AUDI2000 accepted 50% and 13% of the colour pairs respectively. Therefore, from this work it can be said that AUDI2000 works better than dDNA colour difference.