When comparing Toodledo vs Google Tasks, the Slant community recommends Toodledo for most people. In the question“What are the best cross-platform task apps?” Toodledo is ranked 23rd while Google Tasks is ranked 69th. The most important reason people chose Toodledo is:
It's possible to create a to-do item by sending or forwarding an email.
Specs
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Pros

Pro Can create to-do items via email
It's possible to create a to-do item by sending or forwarding an email.
Pro Decent filtering and sorting
Pro Priority organizing
Pro Great GTD implementation
The GTD principles are very perfectly supported by Toodledo.
Pro Functionality-rich
Integrated sharing, note taking, habit tracking, and outlining make this a more powerful tool than a simple list of to-dos.
Pro Upload From CSV
Quickly upload an excel (CSV) file template of tasks to a folder for complex but repeating projects.
Pro Well documented, free-to-use JSON API
If you adopt Toodledo as your productivity system, you can be confident that you can extend it to fit your needs with this programmatic access.
Pro Can tag items
Pro Space to add lengthy text
Notes area that can then be hidden.

Pro Sends a daily email reminder
Toodledo reminds you via email of the tasks on your plate for the day.
Pro Apple Watch support
Integrated support for Apple Watch lets you check on your to-dos on the run.
Pro Integration with Google Calendar
Google Tasks integrates with Google Calendar, consolidating your information in one place and allowing you to easily see which tasks have to be done on what day.
Pro Sync With Android
Pro Subtask lists
Each task can have a subtask allowing users to gradually break down a larger task into steps needed to accomplish it. When a user marks the parent task as complete, all subtasks inside that main task will also be marked as complete.
Pro Printable to-do list
Google Tasks allows users to print their to-do lists.
Cons
Con Free version limited to 20 folders
Con Android app has annoying notifications
Whenever the app fails a background sync action for any reason (server issues, lack of internet connection, etc.), a notification appears.
Con Good as a starting point
Toodledo is a good starting point, but is essentially the same as an Excel spreadsheet where you have to build your workflow via the saved searches.
Con Inconsistent sorting when printing
You can start your tests online, but when you print it comes out differently.
Con Can print calendar or tasks but not both
If you want to see your day, you can see both your tasks and your meetings online. However, you cannot print it altogether as shown online. You have to print two separate things.
