I've always assumed that when we compare two ATG bowlers on CW, We're nitpicking minor scraps and everyone knows that the difference between them is pretty damn negligible anyway and both were bloody good. I'm slowly realizing that my assumption was wrong. Must say I'm slightly shocked at the conviction behind some people's arguments.
See, I'd take Macca but for one match or for a career It makes little to no difference really if you have Macca or Wasim. Extremely, extremely similar output-wise, especially if you bother to analyze Wasim's 18 year career properly and not with one cursory glance of their ****ing cricinfo profile page.
IMO, Wasim was as identically high quality a bowler as McGrath for about the same amount of time as Macca's career ran. If asked to pick between the two, I'd pick Macca but again that's from a cricket obsessed, absolut nit-picking POV.
As to why Wasim gets underrated as a test bowler here, IMO, It's because:-
1) His career was 18 years long, therefore, there were long patches where was merely good. So people tend to remember his early years and his late years pretty vividly as there were a lot of them. Wasim was genuinely top echelon for as long a period as pretty much every ATG bowler.
2) A few honourable men interpreting everything they want to know about Wasim from one look at his still, by any measure, breathtaking stats without doing a career breakdown. Give all stat-lovers a bad name tbh. Worst thing.
3) There were five years between 90 and 95 when Wasim was without doubt of ATG quality but was overshadowed by Waqar taking six wickets a game at 18 and a SR of 30, basically being the greatest fast bowler ever. So that period is usually seen as the Waqar period and deservedly so but Wasim would've been equal best bowler or best bowler in any other team in the world at that period of time.
The following argument argument should not be the be all and end all but I do think their career-breakdowns deserve at least some consideration and at least slightly more consideration than their cricinfo stat pages.
Wasim's career
The early years
1985 to 1989(5 years) - 29 matches - 94 wickets @ 28.18 at a wpm of 3.2
In the above period, He was essentially a very talented support bowler and did his job admirably well.
The ATG years
1990-1999(10 years) - 62 matches - 289 wickets @ 21.4 at a wpm of 4.7
In the above period, He was the Wasim we all know and love and for ten ****ing years which I'd think is a big enough sample size to ascertain one's credentials in the top echelon.
The later period
2000-2002(3 years) - 13 matches - 31 wickets @ 30 at a wpm of 2.3
Meh, really
Thing is, most ATG bowlers have that slight decline at the end and one year in the beginning(Mcgrath included) before kicking off but Wasim's raw stats are 'handicapped' by a massive phase in the beginning and end of his career where he was good enough to remain in the team and be a very good bowler but by no means an ATG or an excellent bowler. It's a career which certainly requires deep analysis to understand.
Again I'd still take Macca and all but it's beyond a joke when people say Wasim is not in the same league, no contest etc.