One of the two blue ones, the one with the more modified rear, is apparently the same aircraft as we've seen ealier in Iranian national colours. The second one is new, but the rear is more similar to the original F-5.
The double tails give some additional place for fuel, but I doubt it is a lot.
The Azarakhsh will probably have a single RD-33 engine in the future, which makes it more like the F-20, but with the new wing. One RD-33 gives approx 11000lb of dry and 18000 kN with afterburner. Quite an improvement over the J85s which provide only a combined thrust of 10000lb with afterburners. But since they are new-built, and not upgrades, I suppose they can produce the airframe to support it. It seems they are still a long way from having a RD-33 powered F-5 copy.
Russia will also (unconfirmed) supply components for a new Iranian developed radar, or the Phazotron- NIIR N-019 radar (also from the MiG-29), which seems a bit big, so I guess a smaller array needs to be fitted, or some serious rework on the front fuselage is needed.
Russia can't supply new planes under UN sanctions, but components are allowed??
RD-5000 is by the way a non-afterburning variant of the RD-93 (FC-1), which is basically a RD-33 but with the gearbox relocated. I don't see why they wouldn't want the RD-93 for this program, instead of the RD-33. Probably because of the availability of the latter because of their MiG-29s?
Does Iran build their own fighters because no one will sell anything to them?
Or do they genuinely think they can build a deadly weapon, like the F-15, Flanker, Typhoon, Gripen, Rafale and possibly the F-35?
Well yes, they want to expand their own aviation industry. Which better way is there to start with reverse engineering older aircraft and then changing bits and pieces. Having their own capable industry ensure them of a supplier. Not just of the jets, but also spare parts and maintenance. You have to ambitious to succeed, so maybe they don't just think they can build planes comparable to the ones you mentioned in the long run, but actually made it their most important goal.
I don't agree with Iran's government or system, but I can't blame them for trying to pull this off.
Anyway, I'll propose a nickname for these F-5 copies: "Flying Turkey".
Happy shooting!