The spatially interpolated European air quality maps used at the EEA are produced by its ETC/ACM on an annual basis through combining observations from AirBase stations as primary data source, with European-wide dispersion modelling information taken from the EMEP model as supplementary data source. The EMEP model is a reference European chemical transport model with a spatial resolution of 50x50 km2. The quality and resolution of the EMEP model influences the quality of the spatially interpolated maps. The recent availability of a series of Copernicus Atmospheric Service (MACC-II) modelling products opens up a possibility for potentially improving the interpolated mapping products of the ETC/ACM, using one of these modelling products instead of the EMEP model. This paper reflects the comparisons of the ETC/ACM mapping results when using either the EMEP model or the MACC-II modelling products as auxiliary variable in the geostatistical interpolation. The paper describes the mapping methods of ETC/ACM, the comparison approaches executed and the suite of input data selected for these comparisons. It describes and discusses the comparison results, leading to conclusions on limitations and suitability of the use of MACC-II products. It includes recommendations in general and specifically on requirements of products from the MACC-II project.