I would like to offer the same title in two different formats at Amazon, namely as a printed book generated from a pdf and also as a Kindle-format (kpf) e-book.
The reason for this is that I can do lots of nice stuff with the layout of a pdf that cannot realistically be done for an ebook, given that I would like the ebook to be reflowable in the usual way.
This nice stuff includes for example the precise placement of sidenotes, the control over many other aspects of page design, and the use of my own fonts that I've created using FontForge, which it's easy to embed into a pdf.
On Amazon's page about linking versions of a book together (thankyou @Granite for this reference), the company implies that it won't link versions together, or at least it won't make much effort to, if some details don't match between the printed version and the ebook.
With what I plan to do, many details in one version will not be the same as in the other. These will not include any textual differences. I mean there will be differences of typography and layout.
I am not sure what exactly the company means by "linking", but presumably there is some way to ensure that when a prospective purchaser arrives at an Amazon page mentioning the ebook they can also be made aware of the availability of a POD version, and vice versa?
What disadvantages are there of doing it this way, whatever "this way" actually is? Obviously there will be the time taken to do it, but will there be any disadvantages in, say, the range of available pricing options, or in accessibility and user-friendliness? Really I would like to make it completely and immediately obvious to anyone who is interested in either version of the book that the other version is also available.