chassis and structural differences between 1989 classic and 1990 series 2000

[Bookman]

Were there significant chassis and structural changes with the 1990 series 2000 Newells over the 1989 classic 40 footer, or was the series 2000 basically the same as the classic, but with a drastically different exterior design? For example, were there different suspensions so that one model rode better than the other? I'm thinking primarily of tag axle models.

By looking at some interior photos and reading feature descriptions, I don't see much difference, other than the exterior design. I generally like the look of the series 2000 a bit more, but I have seen classics that looked really sharp with their particular paint jobs.

Thanks for any input you can give me.