With the HOF you need to also specify a CF-400 Cover Feeder also if you want that (it doesn't come as standard). The HOF is a beast & in my experience very reliable. One thing to note is that the cover feeder won't feed very small booklets, i.e. CDs, so you have to pre-collate those and put the whole thing through the main feed.
I guess you are looking at a 200A or 200L to go with that (plus trimmer, conveyor, accumulator, maybe inline creasing, slitting, etc.). Really, you are not comparing similar items. The Horizon can end up 30 feet or so long and can run all day every day indefinitely. The Duplo 150 Digital Booklet System is a compact little thing that will fit just about anywhere. I've no experience with one, but expect it will be great for light use for a few years. Duplo also make various heavier duty machines BTW that are more comparable to a HOF/200x combo.