Tomte and nisse is the same thing. In Sweden you also use the name tomte, that means a place or site where humans are living (a byggetomt mean a construction site in Danish). So nisse and tomte is the same in Swedish, and you can even say tomtenisse. There is the nuance that the nisse is often, in Sweden, seen as subordinated (and younger than) the Tomte. The Swedes also call Santa Claus: Jultompten (Christmas tomte). Whereas he in Danmark and Norway simply is called the Christmas man and in Finland: the Christmas goat! Some severe paganism has always been going on in Scandinavia :)
Tomte and nisse is the same thing. In Sweden you also use the name tomte, that means a place or site where humans are living (a byggetomt mean a construction site in Danish). So nisse and tomte is the same in Swedish, and you can even say tomtenisse. There is the nuance that the nisse is often, in Sweden, seen as subordinated (and younger than) the Tomte. The Swedes also call Santa Claus: Jultompten (Christmas tomte). Whereas he in Danmark and Norway simply is called the Christmas man and in Finland: the Christmas goat! Some severe paganism has always been going on in Scandinavia :)