A:Answer Hi bicoastalguy, thank you for your question and interest in Model:SPE68B55UC. Here are the biggest differences between the two models: The 800 Series has 6 Wash Cycles and 5 Options and it is 44 dBA. The 300 Series has 5 Wash Cycles and 5 Options and is 46 dBA. Both have Home Connect, Machine Care, Extra Dry and Sanitize.