OmniFocus and Things are essentially equivalent. They both have an iPhone / iPad version synced with the desktop one, which is the most important feature. They differ by a few minor features. On one hand, Things has a "logbook", i.e. the list of recently completed actions, which is useful if you need to give weekly reports to your manager. On the other hand, the iPad and iPhone versions of OmniFocus have a "forecast" view, which shows actions with a due date in a chronological order along with events from the calendar, which is very useful to see at a glance all that must be done today. Those differences are not essential. Just pick one of Things or OmniFocus, and stick with it. :)
OmniFocus and Things are equivalent
OmniFocus and Things are essentially equivalent. They both have an iPhone / iPad version synced with the desktop one, which is the most important feature. They differ by a few minor features. On one hand, Things has a "logbook", i.e. the list of recently completed actions, which is useful if you need to give weekly reports to your manager. On the other hand, the iPad and iPhone versions of OmniFocus have a "forecast" view, which shows actions with a due date in a chronological order along with events from the calendar, which is very useful to see at a glance all that must be done today. Those differences are not essential. Just pick one of Things or OmniFocus, and stick with it. :)