These two marine composting toilets are very similar (Nature's Head probably a knock-off of the Air Head). There's plenty of information in forums online about both......some here too, but I could not find any comparison, let alone a detailed comparison of their quality and features. The Air Head is a bit more expensive with slightly different specs. The Nature's has an oval bowl too, rather than the Air's round one. Other than that, what's the difference?
I'm installing one of these two. Which is better?
Air Head drawing:
Nature's Head drawing: