Probably not as far off as youd think. A lot of the efficiency comes from the smaller node that apple uses. If both amd and apple silicon processors are being compared and that are using the same node, then they are pretty equivalent. 6900hx is still tsmc 7 nm (later version) while the new m4 is on 3 nm. Both are still pretty efficient. It’s not like tiger lake levels of inefficient.
I see. Which is unfortunate but at least there’s a starting point