Originally Posted by BWinmill
In my mind, it really depends upon the book. Non-fiction and reference works are worth more in my mind, both in terms of utility and long-term use. So I'll buy the format that I think will be more useful as long as the prices are within 20% or so. If the difference is more than 20%, I'll go for the cheaper one.
That sounds like it would fit the first poll option best. The poll gives me a limited number of characters in which to express the idea that the content drives the format choice and the price could then a driving factor to choose one format over another, which seems to be what you're saying.