Bear in mind that 'Cortex' covers every modern ARM chip right the way from a tiny (~12,000 gates) microcontroller like the Cortex-M0 up to high performance 64 b

Bear in mind that 'Cortex' covers every modern ARM chip right the way from a tiny (~12,000 gates) microcontroller like the Cortex-M0 up to high performance 64 bit designs like the Cortex-A73, so it isn't a label that tells you anything about complexity...