Posted November 14, 2015
TrevorWilliams: I'm afraid it's no different than physical comics. There are almost always differences in content between the single issues and the collections, and the prices are random.
From what I can see it varies a lot and there is indeed no set pattern. Some collections have added content and some don't - telling which from which can be a bit of a pain and sometimes even just working out which comics are in a collected volume can be a bit tricky (honestly why comixology can't have a more clear product description baffles me although I've a feeling they are set by the sellers and thus different publishers might vary how well they do theirs).
I'd say its best to just take each as it comes and do a quick bit of maths along with reading the descriptions. Generally collected volumes are easier because they will generally have all content plus any extra and will generally be easier to manage download wise (just one click and done to add or remove).
Individual though can get some good deals on bundle sales (like the Aspen comic sales above) but can mean that your comic list gets a little long.
Then you also get comic series (like Witchblade) where only some are collected in volumes and some are not; which just gets messy.