Seriously, it makes no sense if the second upgrade packet (SCU) is worse than the first upgrade package (FCU).
Why did it lose 2x Aim-9L slot?
I know the SCU has HMD, but what else does it has other than that? More missiles is always good, especially if they are some of the best non-IRCCM all-aspect missiles, such as Python-3 and Aim-9L.
gaijins magic, and yeah no aside of the HMD and loss of the aim-9p4s theres basicly no diffrences between the fcu and scu.
so the only use of the scu over the fcu is to just grind out the rp from the mods,
Because the Pythons are on the wingtip launch rails, instead of an under wing pylon, allowing you to take a full A2G loadout without sacrificing the Pythons. The FCU is better pure air to air, SCU is better multirole.