This will help you to maintain logs in a project on
1. Admin Activity
2. Data Access
3. System Events
Basically, this will help you to know about the activity of admin(who did what), Where the data is being accessed and when.
But whereas in stack driver logs, it will enable you to store, search and analyze the log data from google cloud and AWS.
You can also use this stack driver logs for monitoring of logs on the common application components.
For more details check out this google cloud training.