where I can see compare test plans? In general, "Basic + Test Plans" is include: Create and manage Test Plans. Do you have any additional information?
Here you can find description: About access levels
Basic + Test Plans:
Test Case Management
Includes adding test plans and test suites, creating manual test cases, deleting test artifacts and testing different configurations
Test Execution and Test Analysis
Includes running manual, tracking test status and automated tests
Basic:
Test Execution and Test Analysis
Includes running manual, tracking test status and automated tests