I prefer pages, but it's not without its faults. Docs to go isn't bad either, used to use that before pages.
DTG has direct link with saving to Dropbox which is handy. Pages doesn't and involves emailing it to yourself then opening from email in Dropbox.
Other than that, both are really only suitable for small basic editing. Because of the Iphone size, it's a bit messy getting to all the functions for fonts etc.