Yeah the difference between each batsman in the ranking is small, as are the gaps between Hadlee and Imran, and Botham and Kapil as bowlers. The gap between Imran and Botham as bowlers is much larger than any other gap here.I've learned not to blindly follow AI, but I have said a lot of what was explained here.
I said previously and was shouted down, Imran wasn't clearly seen as the best of the 80's all rounders, they were always celebrated as a group. If there was an appointed or perceived leader of the group it was Botham, also said that before and was called a liar.
Now a lot of that did have to do with Ashes heroics, but that's no different to how Warne was elevated.
In a post below @DrWolverine had the contemporary ratings pretty dead on.
Bowling, definitely
Hadlee, Imran, Botham, Dev
Batting much closer, but
Botham, Dev, Imran, Hadlee.
Edit: That's why Hadlee and Imran are clearly superior cricketers than Botham.