The XPro Paks will work with all versions of BiaB including the Pro (entry level) version. They are really designed for users who only have the Pro version.

The Styles in the Xtra Paks will work with higher level versions (e.g. Ultra Pak) but not necessarily the Pro version, as they need specific Tracks that may not be available in the Pro version.

As you have the Ultra Pak, you can get a benefit of new Styles from both Paks. Each offers their own unique styles, and I don't believe that there is any duplication between the Paks.

I purchased both.

Hope this helps.

BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones