That’s literally just an SM with an additional pair of pylons and stronger engines. It’s not worth adding as a separate vehicle, just rework the SM into it, it could definitely use it.
AESA is simply much more efficient and powerful, an aircraft like the Eurofighter will simply have an easier time maintaining situational awareness with the Captor-E than a Flanker M with the Irbis
Many of the top tier airframes should receive MLU packages to model very similar variants or upgrades without adding new aircraft, this can be done for lots of the F-16As and most of the aircraft at top tier in general
9-12 and 9-13 are nearly identical. DA2 F.2 FGR.4 differ in flight performance, electronic equipment and suspended armaments.
Depends of version.
I think there will be 3 versions. Early with weak engines, without HMD and amraam 1 gen tgp, no IR mavericks, 9L+7F/M, mid version better engines, hmd, amraam 2nd/3rd gen TGP , and late version with aesa radar.