The Maia & Borges one (I think Schleich, Papo and Mojö also once distributed it) seems to be an Amazonian manatee judging from the longer snout and lack of nails on its flippers.
All others by Papo, Bullyland, Schleich and Safari Ltd. are the North American manatee which is a bit of a disappointment.
I had a bit of hope for the new Schleich one being the West African manatee but the more I look at it the more clear it becomes, it is a North American one like the rest, the short body alone tells.