One big distinguishing factor is McLaren's instruction enabled them to change a 5/6 to a 1/5. Ferrari's turned a 1/2 into a 1/2.
Alonso was faster than Massa also, He proved in Qualy and he proved in the race. He was screwed up by Vettel at start coz he would have been in front of Massa as he fully deserved . Both were team orders...
Improving the result for the team in the race has long been accepted as ok (see Canada 08 - BMW, as an example).
Where you are simply switching drivers, this has to be justified by the WDC position. Personally, I see this justification for Ferrari but, with Felipe not mathematically out of the WDC by any stretch, this is pushing that justification to an extreme.