
Although I'm not positive that these are indeed the versions of the films produced by AB Groupe, it's important to note that all of Toonami Asia's listings for the Dragon Ball Z films use the FUNimation dub titles as opposed to these which share the same names as the films presented on Toonami UK many years ago.
I believe that it's also relevant to add that FUNimation's dubs for these films never aired on television, which may have perhaps resulted in a lack of an alternative television master, or a gaugeable television rating. Additionally, we know that Time Warner, the company that owns the network, also played a role in funding and distributing AB Groupe's English dubs.
These particular versions of the Dragon Ball films never saw an official release, and beyond a few short clips posted on YouTube, there is virtually no way to watch these films unless you were lucky enough to have recorded them back when they were originally broadcast on Toonami UK over a decade ago.
Toonami Asia is also set to premiere a brand-new English dub of Dragon Ball Super either later this month or sometime in August, which is confirmed to have zero involvement from FUNimation. With this in mind, it's not surprising that Toonami Asia is willing to put voice consistency aside in order to put out more Dragon Ball content.