A level computer science exam question OCR

"A computer uses a Von Neumann processor.
RISC and CISC are types of processor architecture.
Describe the differences between the two architectures."
Mark scheme: CISC is more complex / RISC is
simpler / CISC longer instruction set
RISC requires more RAM
CISC many address modes
CISC may have more registers
RISC takes one machine cycle / CISC
takes many cycles to complete one
instruction
RISC fixed number of bytes / CISC
variable number
my answer: CISC has a compicated processor design, whilst RISC has a simple processor design. CISC has many instructions available whilst RISC has a limited instruction available.

This question is 4 marks, so would I need 4 comparisions, or just 2 (like my answer)??? Also, my comparison points are not included in the markscheme, so would I still get the marks as CISC does have different designs and varied instructions..Thanks

It's pretty simple. You would get the marks depending on the context in which it is used in

But how would I get the 4 marks? How many comparisons do I have to make?

I'd say 2 comparisons and explain the reasoning behind why you chose those two, which will gain you the further 2 mark