Johnson insisted that the fragmented nature of the game made it difficult to play the running rugby that
put paid to Australia
the previous week.
"It was a very different game to last week," he added. "There were a lot of reset scrums, a lot of penalties and lot of bodies around the breakaway.
"It's a good experience for them. Getting quick ball was harder because they committed a lot of bodies and we were not up to speed in that area.
"It was harder to get the ball away, but you've got to deal with it. We could have scored a couple of tries in the first half, but in a way it was a good thing we didn't. I thought we were far more accurate in the second half."
Banahan, who took Mike Tindall's place in one of four changes to the side that beat the Wallabies, was paired with Bath team-mate Shontayne Hape in the centres for the first time at international level.
Banahan joy at try in Samoa win
Johnson believed that the experiment was a success against a robust Samoan backline.
"It is great to have more than one option there. He has proved he can play at 13 as well as on the wing. To have that size, strength and skill at 13 is good," he stated.
Usual captain Lewis Moody was another of England's first-choice stars rested with number eight Nick Easter leading the team in his absence.
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