Question about Samsung Ww80m645opw/Ws

The only difference seems to be that the more expensive one has a aquastop-function.

I had the same question and therefore called the Samsung 0800 support number. They explained me that the only difference is the colour and design. They didn't say anything about AquaStop or different features. There is a Samsung product number decoder: http://en.tab-tv.com which indicates the same.

However I have certain doubts about it - why should it make such a price difference ? I find the Samsung product marketing totally untransparent. For instance the 90M6 (9kg), which is from the same WW6800 series, does not have the AddWash function, whereas the 80M6 does (8kg version)

I tried to research the same and coudn't find any clear differents. I would be also interessted in an clear answer.