When should I use IMS-DB Universal JDBC versus native IMS-DLI browse?

Use IMS-DB Universal JDBC when you can reach IMS through ODBM and want to browse, query, and page segments in the workbench, then attach COBOL layouts in the IMS-DB catalog. Use native IMS-DLI when you need hierarchical PSB/segment access via the OLIMDBR DL/I batch path on z/OS and layouts under the IMS-DLI catalog. They are separate catalogs — a layout approved on one side is not visible on the other.