Roidmi F8 vs Dibea D18. Which one will be the winner in the end? In short, both of them are great product for their price. Dibea D18 is being sold at around $100 while Roidmi F8 is 3 times D18 price at $300+. My recommendation… Just pick the one that suit your budget. You can’t go wrong with either one of them. Personally, I end up using Roidmi F8 more due to extension soft pipe and very useful electric anti-mite brush.