It wouldn't be fair to say that GÖKDOĞAN is state of the art compared to HİSAR O+/HİSAR RF. Those missiles have differences in their operation for surface launch.
- GÖKDOĞAN won't be vertically launched and launcher will have to be directed at target (Despite that, TÜBİTAK SAGE is working on cold launch and thrusters option). HİSARs on the other hand are made for vertical launch from the beginning with the provision for angled launch. Thrust vectoring and general layout play a big role in that suitability.
- GÖKDOĞAN will be a cheaper missile compared to larger and somewhat more complex HİSAR RF. If you think about it, seekers are identical but HİSAR RF also has thrust vectoring and a dual pulse engine driving up the costs. Put that together with 8 missiles per launcher and you get yourself a nice alternative to support HİSARs against saturation attacks of lower end threats.
Of course, I totally agree with what you said about differences between missiles in a technical aspect but what is mentioned in terms of usage concept does not make Gökdemir less sophisticated/state of art or less effective. TVC control is a sophisticated tech for missiles indeed but according to design parameters, not every missile has to have TVC to have similar maneuverability. For example, Tamir or Stunner missiles can perform maneuvrability thanks to fore fins integrated in a position close to the head just like Gökdoğan instead of TVC and actuator sensitivity achieve similar maneuvrability at more cost-effective prices.
In addition, angled launch missiles are no less state of art than VLCs. The important issue here is related to the purpose of design and usage concept. Because of the Patriot or NASAMS are angled missiles, they are no less state of art than VL-Mica or Asters series. Each capability comes with its pros and cons. VLC provides more flexibility compared to angled launch missiles.
Apart from this, dual pulse rocket motors will of course have technological superiority in terminal phase and Hisars will be superior to Gokdemir in terms of this capability but as you also mentioned, the cost/effectiveness will come to the fore and cost per missile will be cheaper in Gökdemir side. Mobility will also play more important role because of weight and size differences in Gokdemir side.
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