Botham was scathing of England's performance at Trent Bridge, as they were hammered by 340 runs, but felt they gave the perfect response at The Oval.
"England dominated proceedings and never allow South Africa to get into the match, they were very impressive after such a poor display at Nottingham.
"They have a habit of doing that, I think it’s the way they play with their positive, attacking approach."
The Sky Sports commentator was buoyed by the contributions of Toby Roland-Jones and Tom Westley on debut and thinks it bodes well for the future.
"There’s plenty of depth now in the squad and lots to play for ahead of the Ashes in the winter,” he added.
"There are a number of players already inked in, the likes of Root, Stokes, Cook, Anderson, Broad and Bairstow but there are others places up for grabs.
"Westley played very positively and Toby Roland-Jones bowled superbly. Mark Wood should be back to face the West Indies with his heel problem so it’s good to have competition."
Botham is tipping in-form Ben Stokes to carry on where he left off at The Oval to top score in the first innings at , while he’s picked James Anderson, on his home ground, to be England’s top wicket-taker at .
England win –
England top bat (1st inns); Ben Stokes –
England top bowler (1st inns); James Anderson –
England win, Stokes top bat, Anderson top bowler –
Stokes top bat, Anderson top bowler –