We've received the press release from Hasbro including official images which show the figures better. Now we know that the Black Series 6" Mace Windu figure will be available in Spring 2019 in the main line. The Vintage Collection Poe Dameron figure will be released in the main line during Fall 2019.
Mace Windu is an all new figure and the figure's likeness is based on Star Wars: The Phantom Menace, have a look at the comparison images below.
Even though the Vintage Collection 3 3/4" Poe Dameron figure is a re-release of the 3 3/4" Black Series figure, it will be updated with the new face printing technology. This release feels boring because the Walmart exclusive 3 3/4" Black Series figure has been peg warming for a long time but keep in mind that the Vintage Collection is just as much about the packaging as it is about the figure.