It is impossible to determine whether Amazon's flash sale prices are necessarily lower than Black Friday's, because their prices are subject to change and are affected by many factors, such as product supply and demand, promotional activities, and merchant pricing strategies.

Although Amazon and Black Friday are both festivals that offer discounts, their price positioning is different. Black Friday is mainly aimed at the US market and is an event that focuses on lower prices, while Amazon pays more attention to the diversity of global products and service quality. Therefore, in some cases, Amazon's prices may be higher or lower than Black Friday, depending on the specific products and promotional strategies.

However, it is worth noting that due to the fierce competition among e-commerce platforms and the influence of various costs, the prices of the same product on different e-commerce platforms may vary. Therefore, if you want to get the best price, it is best to compare and choose on multiple platforms.