The two processes are different. The Kirin 990E uses TSMC's 7nm EUV lithography process, and its architecture consists of 2 A76 super-large cores, 2 A76 large cores and 4 A55 small cores. However, because the chip is a neutered version of the Kirin 990, the Kirin 990E only has 14 Mali-G76 cores;
The Kirin 9000 uses TSMC's 5nm process, and its architecture has one 3.13GHz A77 large core, three 2.54GHz A77 medium core, four 2.04GHz A55 small core architecture, and a 24-core Mali-G78 GPU.
990e is a smaller version of 9000, that is, 9000 picked out the chip performance is not too good, the frequency is reduced, that is, 990e