The cpu is certainly better at 6nm than 7nm.
The so-called nano chip refers to the width of the chip, the smaller the width of the electrode, the more silicon transistors can be accommodated in the unit area of the chip, thus the stronger the computing power. Therefore, the 6nm cpu has more transistors than the 7nm cpu, and the computing power is better. But it also depends on the brand, because the design capabilities of each company are different, and the processing capacity of the foundry is also different, basically Apple's design and TSMC's manufacturing capacity are strong and strong.
7nm and 6nm generally refer to the chip process process, that is, the size of the transistor gate circuit that deals with the surface of the CPU and GPU. Generally there are 14nm, 7nm, 5nm, no 6nm chip process process, in general, the process process is advanced, the smaller the size of the transistor, then the same size of the chip surface can accommodate the number of transistors, the stronger the performance! So 5nm performance is definitely stronger than 7nm