Apple’s claim isnt 100% untrue tbh. It depends on the operations actually. Arm processors have at least 12 registers to contain data or references to memory. A program does need more ram space on a x86 processor, as it only has like 4 registers afaik ( correct me if im wrong! ) so it needs to push data more often to the stack.

This means that the m* processors has to generally save less info in memory. However, data is still data and you still need memory to contain the data youre processing so you still need the ram. So like, when doing video work that apple claim is utter bullshit. Raw calculations however might not be so much bullshit