This is one of those questions that analysts are beginning to answer right now with months to go before the new iPhone hits the market. Comparisons are always "hateful" but in this case, just like occurs with other Apple products when they are released compared to Macs.
This time the website MacWorld explains that the performance offered by the processors inside the new iPhone 12 or whatever Apple calls them, would be equal to or even more powerful than a 15-inch MacBook Pro with a six-core processor in its base configuration.
The new A14 processor that will be added to the 2020 iPhone, comes from the manufacturer TSMC, it would be more powerful than the one used by the current iPhone model and supposedly could go from 7 nanometers (nm) to 5 nanometers. All this makes believe that this will be accompanied by an increase in RAM of the new iPhones possibly reaching 6GB. The sum of the new processor with the increase in RAM could be the reasons why this analyst believes that Apple's new smartphone would be more powerful than a 15-inch MacBook Pro.
Nor can you prove anything until Apple launches the new iPhone, what is clear is that the iPad already outnumber some MacBook and although in the Mac range we have really powerful equipment in terms of the processor and others, the iPhone They are really powerful so we do not rule out that this opinion will end up being a reality in September, which is when the new iPhone models will be launched.