Can't go wrong with either colour. Both look great and I would be just as happy with the nautical Blue as well. Black, silver, Nautical blue go well with the allant frames, I just wouldn't want say a yellow,red etc which I think fit Trek's eMTB line better. I passed on the allant9.9 carbon cause of the Blk/red.
Funnily enough I posted the same pics on the r/ebikes subreddit on reddit and some made the same comment. I took the photos facing east and had my back to the setting sun in the west.
Honestly, I knew no reputable freight forwarder would have allowed me to ship the bike with the battery. I also delayed my move overseas specifically to get the software update to 85nm torque, got the update and confirmed personally with my own eyes at the Trek LBS and cobi app where it displays the current software build. It cost me all of August riding time but well worth it. In the end my bike arrived undamaged and one week earlier than expected(7 weeks total in transit) all's well that ends well.
edit: Same time , same spot but another photo I took while facing west. Here the matte silver lacks the golden hue from the setting sun.