The certification lists the SM-A908N, which points to the 5G variant. There's also an SM-A908B, presumably the 4G model.
Both the 5G and 4G Galaxy A90 will be powered by the flagship Snapdragon 855 chipset paired to 6GB of RAM. Both are expected to have a 6.7-inch Infinity-U Super AMOLED display of FHD+ resolution.
We expect the 5G and 4G models to differ in the camera department - the first should have a 48MP+12MP+5MP setup while the second a 48MP+8MP+5MP array.
Given the recent certifications we expect the Galaxy A90 to become official quite soon.