You can use either QUIZ or QTP to create a subfile. QTP has two features that can make it a better choice:

1. The record length of a QUIZ subfile can be greater than the original data records because fields with multiple redefinitions appear more than once. The record length of a QTP subfile is exactly the same as the original data records.2. QTP's syntax is more flexible. With QTP, it's easier to reference fields from two datasets to create a subfile for Suprlink output. You can also use an alias to include items with the same name.