The price difference between Xiaomi's 30W and 55W power adapters is mainly due to their production costs and performance differences. Compared with 30W adapters, 55W power adapters usually use more advanced technology and materials to support faster charging speeds and higher power output. In addition, high-power chargers require more stringent performance testing and certification, which also increases production costs. Therefore, although the 55W power adapter is more powerful, it also leads to a higher price. Therefore, the price difference is mainly based on the difference in technology and performance.
Your comparison is meaningless, there are many configurations of the two mobile phones are not the same, one may be charging is a selling point, the other square meter is a selling point, your this is completely meaningless