I am also presenting my speculation but yes if your criteria is cheap dismissals below 20 then the likelihood of Gavaskar scoring more than 20 off the other bowlers is more with Imrans bowling support than Marshalls. Gavaskar is on record saying his job was to see off Imran and milk the other bowlers. How to do that vs WI?
He wouldn't be able to do that no, but if we say that Gavaskar punished the other Pakistani bowlers for another 10-20 runs before getting out in Imran's first spell of bowling why doesn't his dismissal scores reflect that? His next scores after being dismissed for 17 from Imran are 42 & 44. Those were not in the first spell of bowling. I don't think bowling pressure was the main reason that contributed to Marshall being better at getting out Gavaskar early, it only meant that he got him out for less total runs. It's not just about the 20 runs or less number, it's about getting him out in your first spell of bowling, which is the opening bowlers job.
Imran and Marshall basically have similar numbers against Gavaskar. If anything, Imran is better
That is just your opinion, I've backed my reasons up with stats including that he was better at getting him out in India & got him out earlier & cheaper. The only thing you can point to is that he got him out more often from more games. This is while he was opening the bowling for all of them (whereas Marshall was not) & didn't have to compete with high quality bowlers to get him out so Imran directly bowled to Gavaskar ALOT more than Marshall did for a similar rate of matches per dissmisal.
There are bats like Gower he is better against and of course against the best bats of respective side of Viv vs Miandad he has a edge.
Border is a harder batsman to get out than Gower.
And you said for arguments sake Viv vs Miandad was roughly equal. And there's plenty of context I provided to that point but
I don't think this is the best way of saying who was better because we don't know how Imran would have faired against Miandad, it's not a direct comparison. Although we do know that Marshall was quite capable of getting Viv out from county games.
I am not sure what the debate is.
Does the presence of one good batsman at number 4 make it notably harder for the bowler to get the other 5 batsman out?
At the very least it shouldn't impact the first 3 batsman's ability to survive Imran or Marshall's opening bowling.
perhaps you need to do a comprehensive analysis
I only do this between ATG bowlers to decide who should make the first XI because the gaps in quality are smaller at that point. Overall record, skill & peer rep are considered first. That's why someone like Anderson wouldn't come into it. I do think there are certain skill sets that may be more conducive to getting top batsman out when you consider the success of bowlers such as McGrath, Ambrose, Hadlee, Lillee & Marshall. They all had a high level of accuracy, utilised subtle variations of swing/seam movement & were clever bowlers. Imran also had these skill sets (although primarily bowled inswing) hence why he is up there too. So when Marshall can do what Imran can but also swings it both ways + bowls faster while maintaining control that's why I think he is better equipped to get the best out.
If you also rate Marshall higher as a bowler, who do you think he was performing better against to justify that? His percentage of top 1 to 7 wickets is higher despite not being an opening bowler for a third of his career when compared to Imran. So it can't have been against the tailenders & I don't think the presence of Greg Chappell & Viswanath for their respective sides accounts for the difference in those percentages. It can't have been due to playing against the WI because to Imran's credit, his record against them was better than other nations (apart from Sri Lanka) & Marshall didn't have the benefit of getting easier top 1-7 wickets against Sri Lanka for comparison. I'm not denying Imran wasn't good at getting good batsman out I just think Marshall was a bit better.