I can't compare the two, but I've had the HP B9180 for a while, and so far, I'm pleased with it.
I've made a couple of digital negs on Pictorico Premium OHP for silver printing, and it works for that. I haven't tried to make a digital neg for albumen yet, but Sandy King used it for carbon and perhaps other processes, so it should be usable for alt processes. For silver, I've only made greyscale negs. For albumen greyscale won't have enough density, so I'll need to experiment with other colors.
I've also made some B&W and color prints, and they look pretty good. I prefer silver for B&W, but on Harman Gloss FB AI, it can produce some fairly convincing prints. With the right paper and ink combination, the prints are also very durable and resistant to smudging, and in some cases waterproof.