Macbook Air Specification:
CPU: Apple M1 - 8 Cores
(Single Core @ 3.2 GHz, Multi Core @ 3.0 GHz est.)
GPU: Integrated gpu in M1 chip - no external GPU
RAM: 8GB LPDDR4

5k iMac 2020 Specification:
CPU : Intel Core i7-10700K - 8 Cores, 16 Threads @ 3.8 GHz
(Single Core @ 4.7 GHz, Multi Core @ 4.3 GHz est.)
GPU: AMD Radeon Pro 5500 XT 8GB
RAM - 64GB 2667 MHz DDR4 (4 X 16GB)