srategic test is a organisational level term which is 
applied for all the projects in the organisation with small 
customisations

test plan is project level term and which can be applied 
for that specific project only.

  test plan is a srategic document which describes how to 
perfoem testing in an efficient effective and optimsed way.
Quality lead test lead can prepare this test plan

  strategic test plan is a already or new test plan which 
can bw used in the future for another project also with 
some changes in the same organisation.

Test Plan: This a document of how the testing will be done. 
It contains:
Scope of testing
Dependencies
Risks
Entry Criteria
Exit Criteria
Env fot Testing
Tools Needed
Type of Testing to be Performed
3rd Party Dependencies

Test Strategy: This is a company level doc which tell the 
strategy of your testing. It includes
What should be tested
How it should be tested
Resourses for testing
Timeline for Testing