OK! In that case both are equal:That's exactly what I said.
In case you missed it: The total lens length figure in the patents is not the physical length of the lenses - instead, it includes the flange distance of 20 mm. So that has to be substracted in order to get what you call the real lens length. But since you can't mount an RF lens to an EF body, the only relevant comparison is when both are mounted to an RF body - so you have to add the 24 mm adapter length to the EF lenses real length. It is not a one or the other consideration.
29.25cm -2cm +R5 depth = 27.25 cm + R5 depth
24.8 + 2.4 + R5 depth = 27.20cm + R5 depth
Same total length. I guess unless some DO technology is involved we cannot get length savings.