I'd be interested to know if those numbers changed if you take out the 'easy' Tests eg. Bangladesh, WI, NZ - maybe SL and Pak at home as well.
And Australia..................?
I'll take out WI, BAN and NZ, but the rest remain - this does go back to when Pakistan and Sri Lanka were decent sides.
England Away (2000-)
Five bowlers : P33 W6 D10 L17 (Won 18.18%) Took 20 wkts = 24.24%
Four bowlers : P21 W7 D6 L8 (Won 33.33%) Took 20 wkts = 47.62%
England Home (2000-)
Five Bowlers : P29 W15 D7 L7 (Won 51.72%) Took 20 wkts = 62.07%
Four bowlers : P29 W13 D8 L8 (Won 44.83%) Took 20 wkts = 41.38%
Certainly still supports playing four bowlers away from home, five would only work when you have a Flintoff and in his element - his batting average at home was 35.35 compared to 28.80 away.
But if you want by opposition :
Win% - since 2000
vs Australia : Five = 22.22%, Four = 41.67%
vs India : Five = 16.67%, Four = 57.14%
vs South Africa : Five = 41.67%, Four = 25.00%
vs Pakistan : Five = 16.67%, Four = 53.85%
vs Sri Lanka : Five = 50.00%, Four = 20.00%
vs Sri Lanka with four bowlers includes six draws so only two defeats, while we won five with five bowlers we lost three and three of those wins were at home, two when we just about won in Sri Lanka in 00/01.
South Africa includes the series win in South Africa, one of two big
contribution series by Flintoff (23 wickets that series) and the 2-2 in England.
Crunch stat is with four bowlers we've not lost more Tests than we've won against any given opponent, with five bowlers we've lost more Tests than we've won against Australia, India and Pakistan who you might deem strong enough sides since you've not asked me to remove two of them and one was a maybe (at home)
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Against Australia and India this batting lineup was posting 600+ scores. Do the West Indies really have better bowlers?
There are at least two other factors to consider, one is complacency. Against India and Australia you work harder and don't relax, you play less silly shots knowing that big scores are the way to beat the sides.
India were poor in 2011 in England, by the time we put 710/7 on the board they were 0-2 down and probably thinking about their next IPL contract
The other factor is pitches/suitability. Is England closer in types of pitch to India or West Indies? I think we made good use of the aussie tracks, they didn't. And once you've conceded a big score it changes the complexion of the match. When we last played Australia in England our highest total was 435 in five Tests, only seven more than we scored here this Test/series - the aussies scored 674/6 which was over 200 bigger.