There are basically 3 types of J seats on Saudia
1. The 787 like, herringbone 1-2-1 config. Only on the 3 class 777. Super Diamond
2. The Diamond seat in 2-2-2. Like what UA 787 originally had.
3. 2-2-2 old style lie flat seat. These are on the early 777s delivered up till around 2015. These are also the 77W with 3-4-3 in Y.
There was another config with 4 rows of 2-2-2 in first class and 6 rows of 2-2-2 in business. I don't think they're around anymore and have been reconfigured to version 2.