The entire voice cast (Japanese and English) changed for Tokyo 2040.
Priss's Japanese voice also changed between Crisis and Crash, due to her original being busy with her singing career.
Leon's Manga UK English voice changed between Crash and the AD Police Files prequel. His AD voice (Adam Henderson) ended up moving to Canada, and voiced roles in Inuyasha and the Ocean dub of DBZ.
Dueling Dubs: Anim Eigo dubbed all 3 original shows (Crisis, Crash, and AD Police), but Manga UK produced their own dubs for Crash and AD Police. The original Bubblegum Crisis was picked up by a different distributor in the UK, and got to keep it's Anim Eigo dub.