The query_hash and query_plan_hash actions in extended events do not have the same data types as the columns in the DMVs sys.dm_exec_requests, and sys.dm_exec_query_stats. That makes it difficult to correlate the information.
It would be good if the data types for the actions in extended events could be changed to the same that are used in the DMVs. If you don't want to change the data types for the existing actions, you could also add new actions. Another option could be to provide a conversion function.