The better option between沁园RO and沁园RU water purifiers largely depends on your specific needs and preferences. Generally, the沁园RO model is considered superior due to its ability to remove a wider range of contaminants, including dissolved salts and heavy metals, compared to the沁园RU model which primarily filters out particulate matter.

The沁园RO system utilizes a reverse osmosis (RO) technology that effectively filters out impurities at the molecular level. This process involves passing water through a semi-permeable membrane that blocks particles as small as 0.0001 microns, which is significantly smaller than the particulate matter that the沁园RU model can filter out. According to a study published in the Journal of Environmental Science and Health, RO systems can remove up to 99% of dissolved salts and heavy metals, making them ideal for areas with hard water or high levels of contaminants.

On the other hand, the沁园RU model, which employs a combination of sediment and activated carbon filters, is more suitable for areas with relatively clean water sources. These filters can remove particulate matter, chlorine, and some organic compounds, but they are less effective at removing dissolved salts and heavy metals. While the沁园RU model is more affordable and requires less maintenance, it may not provide the same level of purity as the RO model.

In terms of data, a comparison of the two models shows that the沁园RO model has a higher removal rate for contaminants. For instance, the RO model can reduce lead levels by up to 99.9%, whereas the RU model may only reduce lead levels by about 90%. This significant difference in contaminant removal is due to the RO system's ability to filter out smaller particles and dissolved substances.

In conclusion, the沁园RO water purifier is generally considered better than the沁园RU model due to its superior ability to remove a wider range of contaminants, including dissolved salts and heavy metals. While the RU model is more affordable and easier to maintain, it may not provide the same level of purity, especially in areas with hard water or high levels of contaminants.