Technically all of these figures are "Saga Legends". I think the carded samples for Vader and Snowtrooper are errors as they should only have the Star Wars logo at the top and not the SWR.
So do Rebels and Legends all have the same SKU/DPCI number, and are they coming in mixed cases? I haven't seen case assortments listed for these yet.
Rebels/SL are the same assortment (mixed in cases).