Hey, something I know about!
I use the ICP42 for up to 16x20, and the Jobo CPP2 for 20x24. The ICP is great for "production" runs, when you need many prints and/or different sizes, and not worry too much about "mistakes." One shot of the chems yields a lot of prints. I found it's easy to clean, and in 12 years have had no failures.
The drum processing requires a lot more water, and more critical attention, but yields the same quality results. You must dry the drums between processes, measure new chems, etc... so the through-put is not as great.
Hope this helps.
DT