When comparing Diigo Outliner vs Casual, the Slant community recommends Diigo Outliner for most people. In the question“What are the best browser-based to-do list apps?” Diigo Outliner is ranked 15th while Casual is ranked 20th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Easy to organize ideas, tasks, links and notes hierarchically
Pro Links can be added from anywhere
Links can be added at the bottom of the outline from any web page, using Diigo's bookmark functionality.
Pro Nice-looking pasted URLs
Pasted URLs automatically turn into href links named with the title of that page
Pro Tracks task dependencies using a graph
Pro Great to-do templates
Every to-do list & project can be saved as an amazing template that you can re-use in the future.
Pro Offers a high-level overview of projects
The workflow with dependencies shows where the things are at a glance. No more frustrations of how your project is going and who is doing what.
Pro Sync deadlines to Google Calendar
To-do items can be integrated with your day-to-day schedule using Google Calendar.
Pro Visual way of organizing your work
The workflow includes dependencies and shows you where things are at a glance.
Cons
Con Impossible to add links, items and notes by email
Con Price
At its cheapest level, Casual is $9 per month for two users and two GB of storage. The trial period is short and there is no free version.