Answer 1

CU i.e. control unit controls your input and output devices whether CPU is the brain of the computer in which CU exist meaning that CU is a part of the CPU. CPU has other parts for other operations.

Answer 2

< The Eagle /> So can we consider CPU as a superset of CU?

Answer 3

Gabriele Gatti No, CPU is the combination of CU, ALU, memory etc. Not everything is CU