The N-classes and Gr. X were removed in favor of the refurbished PP system (cars that were formerly in either of the two now compete through PP matching against cars of a similar PP region).
The race car categories (Gr. 1, Gr. 2, Gr. 3, Gr. 4 and Gr. B) will feature the classification, but also with the PP system to ensure a more effective BoP and even playing field.
The Ford GT LM Spec II Test Car is a Gr. 3 vehicle. I don't see how the Ford GT LM Race Car Spec II (the original version of the car with the white paint job and with no front canards) will not be any different to that.
Especially when you realize it has 17 more hp and is 35kg lighter (607hp/1130kg/MR/SC), it fits Gr. 3 regulations well and is in line with FIA GT1-style Gr. 3 cars. The lack of the front canards mean that it might have a little less downforce, but a slightly higher top speed.