what's the point in getting the reverse swing and still end of being less effective than Ambrose. Infact true master of reverse swing is Waqar Younis because he had the pace during his early days.  You say Wasim/waqar made england look like club side. Hmm..... well his performance in that series was good but not outstanding taking 21 wickets in four tests. Infact wasim's best performance have come in seaming conditions in New Zealand.  Ambrose has a better record in England than wasim. Also England were not very fancied side in the nineties.  I have seen Curtly Ambrose took 7 wickets for just  1 run in a n spell against Australia. Talking about england Ambrose bowled out England for 46 runs. When did Wasim created such a havoc? I have known south africa celebrating the victory when they needed 78 runs to win the test match with 8 wickets remaining and then losing rest 8 wickets for just 26 runs. All credit to Ambrose. Wasim Record in the bouncy conditions in South Africa is very unimpressive. Mind you South Africa have been second best side in the world all these years.

Statistics are like Girl's Skirt they show more than they hide. The fact that Ambrose has done better than Wasim in every continent there lefts no case for comparison. I am not only talking about economy but also averages and strike rate. He takes wicket in lesser ball, giving lesser runs. By no mean i am saying wasim isn't a great because I have put him in number 3 below ambrose and McGrath because his record against the top teams in the nintees isnt as impressive as Ambrose. Not to forget Wasim's batting ability as well. But purely as a bowler I will rank him  just below Ambrose and Mcgrath. 

Anybody is free to disagree.