"Are the politicians that run for the House of Representatives the same as those that run for the Senate?"

When someone decides they want to be a member of parliament, they must choose if they want to be a senator or a member of the House of Representatives

The Australian Constitution says that a person can only be a member of either the Senate or the House of Representatives; they cannot be a member of both (section 43).This means, for example, a senator cannot be a candidate for a seat in the House of Representatives without first resigning from the Senate.

diagram to help explain Are the politicians that run for the House of Representatives the same as those that run for the Senate?