HANA Development Best Practice -- BW, HANA custom tables, schemas

We have a BW/4HANA system where we created on installation the schema SAPBW for the BW/4HANA system. We're also doing HANA development off the same HANA database server. Should we create HANA tables in a different schema or use the same SAPBW schema?

Thanks.

Regards,

Mel Calucin