All AES67 compatible stations have a black faceplate.
All non AES67 compatible stations have a gray faceplate.
Another way to identify Ultimo (ULT) vs UltimoX (UXT) is to look at the actual chip model (which is easier to see).
The AES67 compatible UltimoX has the letters UXT -xx-xxx and the Model start with MK64.....
The non AES67 Ultimo start with ULT-xx-xxx and the model starts with MK60.....
The chip is located on the same PCB as the network board.