Hi,

You can get the full IContent instance for each item either by fetching the items individually like this:

var items = myPage.MyContentArea.Items.Select(x => x.GetContent());

or by fetching them in bulk using IContentLoader like this:

var loader = ServiceLocator.Current.GetInstance<IContentLoader>();
var contentRefs = myPage.MyContentArea.Items.Select(x => x.ContentLink);
var items = loader.GetItems(contentRefs, currentPage.Language);

To compare versions, you can do that directly in the CMS UI by clicking the compare button () or you can access previous versions of a content item programmatically using the IContentVersionRepository, for example:

var versionRepo = ServiceLocator.Current.GetInstance<IContentVersionRepository>();
var versions = versionRepo.List(myPage.ContentLink, myPage.Language.Name);