I asked my source for clarification. This is what he said:
Hotline used to be called Purple Fountain, it was bred by Erwin at Makbreeding, There is also another variety called 'The Edge; it is a Sister variety, looks identical to me !!
Millesimo was bred by Vletter den Haan, much bigger flowers than Hotline, lovely pink edge, if flowered under warm condition, but the flowers can be pure pink if they come open in colder conitions. For this reason Vletters have given up on this breeding line.
So they are indeed different lilies.
