What’s the difference between ECAM 21110 and ECAM 22110 models?

The only difference between the models n this series is the colourIn the 21110 series:ECAM21110.B is all blackECAM21110. W is all whiteECAM 21.110.SB is black with silver frontageIn the 22110 series:ECAM 22.110.SB is black and silverECAM 22.110.B is mainly black