Well, I am biased, so I would go with Nirvana. But both are quite good, so choose whichever makes you feel confident in your external system and happy to use it.I want to like Nirvana. I have a windows computer at work and everything Apple for personal. I’ve tried to keep Omni for personal and Outlook for work, but I seem to like everything in one place. Tried Omni via iOS and their web interface, but it was too clunky.
Have simplified for a while with Todoist and it is fast and simple using Kelly’s setup guide. But I miss not seeing the the next actions as a project and having a start date.
So - i’m Down to Nirvana and Todoist. Spending too much time fussing and should just pick one. Nirvana is great for organizing but it does take extra effort to add the tasks and not as quick to pull them up. Todoist filters are great for that.