Astro 25 is Motorola's trade name for P25 but the CPS is often named after the series.
Astro series - Astro Spectra (mobile), Astro Saber (portable), XTS3000 (portable). Named for the "Astro" VSELP based protocol the radios originally used prior to P25's CAI becoming a standard.
Astro 25 series - PM1500 (mobile), PR1500 (portable), XTS 1500/2500 (portable), XTS4000 (portable), XTS5000 (portable), XTL 1500/2500/5000 (mobile), Astro Spectra Plus (mobile). For all intents and purposes Px1500's are just analog conventional XTx1500's, all XTL bricks are the same for the band/power, and an Astro Spectra Plus is an Astro Spectra with an XTL5000 control board (and vocoder). Named for the fact that the line was the first fully P25 complaint line.