Vaughan's comments came after England lost to New Zealand in the two-match Test series recently.
On Wednesday, happy scenes were witnessed at the PCA awards ceremony as Leach and Stokes embraced each other after the spinner took possession of the painting he would treasure all his life.
Smith was replaced by Tim Paine midway through the Cape Town Test back in March 2018.
"I had an added responsibility to try and get their big players out," he said
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Ben Stokes compared Jofra Archer with Pat Cummins, who took 29 wickets in Ashes.
The England and Wales Cricket Board (ECB) shared a picture on Twitter in which Smith and Leach are seen smiling at the camera.
All the major stats and numbers from Steve Smith’s record-breaking Ashes series.
The 2-2 ending meant both England and Australia finish with 56 points in the ongoing ICC World Test Championship.
All the stats and numbers that were recorded during a rare drawn Ashes series.