2 main reasons FOR separate:
1) Security (includes PG supervision needed)
2) The Metadata (Columns) vary significantly (and can't be optimized. I see extra columns where a Tag and a VL or 3

would get the job done. AKA Brute force)
2b) A column with
Fixed values needs to be different

Ask yourself:How much added disk space would those 'Extra' (not used for the other Library take)