Tim,
I too was confused about exactly what they are doing (although I think I understood back in January when I placed my order).  It appears that they are indeed doing both Magor and PC&F versions with the differing roofs.  The BAR cars (ESM 4001 series) are the Magor cars and the NH cars (ESM 4003 series) are the PC&F.  Look carefully at the two attached renderings.  As you say, there are additional paint scheme opportunities; the NH cars later lost their charcoal heaters to become plain insulated boxcars (AAR XI or IX, NH stenciled them both ways!) See attached photo by Ron DeFilippo of NH 45023 & NH 45050 in a B&M train in 1968.
--
Chris Barkan
Deerfield, MA

Attachments:

• NH 45023 _ NH 45050 plug door insulated boxcars in a B_M train coupled to each other 1968 _Ron DeFilippo_-PS.jpg
• ESM400101XL.jpg
• ESM400301XL.jpg