In reading the order guide, it looks like the BL adds LED tail lamps, LED "Signature" headlights, special BL suspension with front stabilizer disconnect. BL shows standard 10 speed with 2.7 which you can get on BD and it looks like trans on BL has trail control, trail turn assist, and one-pedal...
55 with 2 young adult daughters (who can't wait to drive around town with the top and doors left at home) and a 50-pound puppy. Went with 4 door Black Diamond was SAS, 2.7L, and Mid package.