The lineout was a case of the latter. The twin towers of Eben Etzebeth and Victor Matfield destroyed Samoa's game on the touchline. The accuracy of South Africa's kick-chase game in the first half and their ball retention in the second gave Samoa so little possession and territory.
But Samoa will know they could have done more to keep the ball. They will feel all aspects of their kicking were poor. Their kickoffs, especially, gave South Africa time to set rolling mauls and win penalties.
Then there was the avoidable intercept pass that was a big factor in shifting the momentum.
Mike Stanley looked up, saw JP Pietersen blocking the path to Alesana Tuilagi and went to throw it over the top. He just didn't get it anywhere near high enough and the instant Pietersen dotted down, South Africa settled and began to believe.
"We threw everything at it. South Africa came hard at us from the start and credit to them," said Samoa's coach Stephen Betham. "It was exactly everything we expected [from South Africa]. We tried to throw things their way, they responded well but we didn't."
The door is still open for Samoa, though. They can still do what they came to England to do and should be able to draw some positives from their performance.
They held up physically on defence - South Africa may have scored six tries, but they had to work for them all. The Samoans held their structure and shape on defence and barely missed a tackle which shows how relentless the Boks were.
Everything is still to play for and Samoa, with a bit of luck, are still on track to make the last eight.