And I presume Steyn and Johnson are both bouncy track bullies judging by the fact neither of them have ever really had stunners (or matched Anderson for that matter) in test cricket in England and generally perform better in home conditions .
Again you're wrong.
For the sake of fair comparison its anderson vs sa in eng and steyn vs eng in eng.
Anderson has 39 wickets @ 37.76.
Steyn has 23 wickets @ 31.65.
So clearly not as great as his career average, Steyn still owns Anderson in his own backyard.