Yes, bk, I read about the Marx Brothers set on the internet by an internet reviewer who synched up THE COCOANUTS and ANIMAL CRACKERS on side-by-side laptops and said they were the same with the same artifacts, edits (skips) as before, and he mentioned he noticed no difference in sound. But, DUCK SOUP wasn't mentioned and, of course, I'm sure you're right about that. Maybe since it's widely regarded as their masterpiece (I like HORSE FEATHERS better though, naturally, the depth of satire isn't the same), Universal did do some clean up and remastering with it.
They're not selling the movies separately as Warners did with some of their Marx set, and the only one of the Image ones I didn't buy was THE COCOANUTS since I had it on laserdisc and the reviews then said it was simply a port over from the laserdisc master.
So, I have to decide if I want to sink $35-40 on the set or simply dub a DVD from the laser for THE COCOANUTS and keep the other four that I already own.
Are there any extras at all in the set. The reviews I've read haven't mentioned anything.