Dyson has many sub-models because its naming scheme is not confusing enough. Each has a different number of accompanying tool attachments and accessories. Each model (V7, V8, V10, V11, etc.) seems to have a new sub-model, so the list keeps increasing, and then there are discontinued sub-models shown on the website as old stock, usually on sale.
Absolute Usually the version of King of the Hill with the most attachments. We can’t list them one by one because they vary from parent model, but you can expect a variety of brush nozzles, crevice attachments, and drum motor heads to scrub hard grit on hard floors and thick carpets.
Extra large The head of the V11 is 25% larger, allowing more floor area to be cleaned in each pass, and the trash can is 150% larger than the non-Outsize V11.
Allergies In the past it meant that it was equipped with an upgraded filter that could capture 99.99% of bacteria and dust, so the air it exhausts was cleaner than ordinary models, but after V7, all Dyson vacuum cleaners began to include upgraded filters. It is now mainly a legacy name and has not been used on newer models.
Motorcycle head It sounds fancy, but it’s a low-terminal model with an electric head, a few basic brushes, and a crevice tool, and nothing more. Mainly leftovers from the V7 era. Dyson has found other names for the basic submodels.
Origin And Animals Comes with relatively few accessories. Animal does not have any unique attachments, especially useful for cleaning up pets; it just becomes a shorthand for “basic model with fewer attachments”. The same is true for Origin, although its name is more meaningful.
Dyson also does not combine sub-model names, so if you look around, you will see some old stock of V7 Motorhead Origins. Basically, the more Dyson names the model, the more accessories it comes with. For example, V8 Animal Pro is equipped with more things than Animal, but Animal Pro+ is equipped with even more things.