Waterdrop sells several water-treatment formats, so “Sküma vs Waterdrop” is not a single product comparison. The exact Waterdrop model matters.
Compare like with like
- Countertop RO versus countertop RO.
- Under-sink RO versus under-sink RO.
- Carbon filtration versus carbon filtration.
Build a simple ownership model
Calculate purchase price + estimated filter cost over three years + installation where applicable + electricity/water costs where material. Use current manufacturer pricing and state your assumptions.
Don't confuse feature count with filtration performance
A screen, app or temperature setting may improve convenience, but it is not evidence that a system removes a particular contaminant. Treat filtration claims separately from appliance features.