Hello, I don't know the difference between these two models. The V11 animal extra is very effective, especially if you have pets as the name of the model indicates. I would like to know if there are any other brushes included, but I don't know if one of them is specific for the mattress.

According to our information, the following accessories are included: Combination accessory nozzle, direct drive electric brush, accessory holder for the suction tube, charger, crevice nozzle, mini electric brush, extra-soft brush, wall bracket.

Yes the battery is replaceable

Yes, the scope of delivery. It is best to look at both vacuum cleaners directly at Dyson, as you can see directly what is different.