isolation of schema in same project - SAP HANA Modeling

In SAPHANA XSA Project . I need to have more than one schema for same Project.

For Example - Subject Name - statistics - I need two schema one for stage tables and one for data store tables .

which is best practice

1) One Project Name - PROJ_STATISTICS - with two DB Module [ DB_STAGE_STATISTICS | DB_RDS_STATISTICS ]

2) Two Projects - [ PROJ_STATISTICS_STAGE | PROJ_STATISTICS_RDS ] and with one DB Module for each.

- Can we have more than more hdi | db schema in one project.