I've already provided evidence, your speaking out your @$$, they are all from the 80 series aisin transmission line, so no the models aren't different the attaching parts at the front and rear are. Much like the 1UR-FE and 3UR-FE engines which share more parts than not.
It's not cost effective to manufacture, maintain logistics chains, maintain special tooling and train technicians among other things on four complete different setups, there is a reason the auto industry and others have been using shared architecture for decades. They even share engineering, design and technology through various partnerships and have been doing so for a long time (Ford/Mazda, Ford/Volvo just one example), our Volvo has numerous FoMoCo stamped parts on it.
Kinda like the T24 and V35 engine families both have allot of configurations based on platforms used on but the internals and blocks are all the same within their respective family. Nothing is mechanically designed at its required rating, common engineering design factors anywhere 1.5 to 2.5 times the max configuration stress for adaptability and reliability.
Automatic transmissions can be adapted quite easily to suite the application when otherwise internally exactly the same via just a torque convertor change or if more is needed changes to the valve body, the axles gear ratio also plays significantly into what kinda stress the transmission is going to receive and these days the shift logic for the ECU can yield dramatic effects as well.