What is the main difference between screw air compressor and piston air compressor

Now many people have heard of screw air compressors. It is clear from the literal view that this type of air compressor is mainly silent and oil-free. Dao looks like this and knows that the difference between it and an ordinary air compressor is silent and oil-free. Screw air compressor manufacturers indicate that ordinary air compressors are generally noisy and have oil. Over 98% of the air compressors currently used in China are oil-injected air compressors. To obtain oil-free compressed air through an oil-injected air compressor, you need to face the following problems. Install multiple filters, but still worry about exceeding the oil content. 2. Realize oil-free, but I don't know how much extra electricity is paid for this. 3. It is necessary to bear high post-processing maintenance and maintenance costs for a long time. 4. Consume air compressor lubricating oil, and need to dispose of waste air compressor lubricating oil. 5. These two types of air compressors have their own advantages and disadvantages. Since they are both available on the market, it proves that these two types of air compressors have demand. In general, the price of lower screw air compressors is lower than that of ordinary air compressors. The price is higher, but in terms of performance and other aspects, the screw air compressor is better than the ordinary air compressor