Hi Krishna,
Query browser is any time better than BI Web Service so i will suggest to go for query browser only.
And instead of tab component use lable based menu component and canvas (use dynamic visibility) and trigger each and every connection on the based on lable based menu selection means initially connections related to first lable only gets trigger and accordingly...It will work for you.
Revert in case of ant issue.
Regards,
Rohan Ghadi