here we are talking about his effectiveness as a bowler alone in comparison with botham. i believe ian won more matches with the ball, as did wasim and amby, than pollock. i am not getting into their numbers in detail. i brought up the fivefers coz you are a match winning bowler only if you can run through a batting lineup on a regular basis. botham did it more often than shaun. those 27 fivefers prove that.
Sorry, I need to chime in.
I feel it's wrong to equate being a better
'match-winning' bowler as the same as being a better bowler
allround.
It's a
bowling attack's job to take wickets, each individual bowler in said attack may have a different role.
Pollock was rarely, if ever, the leading strike bowler in his side. His role was to hold up an end, build pressure, and let the more attacking bowlers seek wickets. That should not be held against him. Nor should it be used as evidence to suggest that he is a less capable bowler.
Similar to how one wouldn't compare batsmen of contrasting styles. Sehwag and Langer both opened the batting and with success, but their methods and their roles in their respective sides means that any comparison of the two would basically be worthless.
You can talk about skills, potential, ability, limitations...but personally I feel if you limit yourself to using WPM/5-fers/SR as indicators of a bowlers quality, then you are doing it wrong. Not all ATG bowlers have to be match-winners. Guys like Donald, Botham, Steyn, Anderson all credit part of their success to good containing bowlers (Pollock, Underwood, Morkel, Swann as some examples) from the other end.