1st, KF-21, roughly at the level of a "4.75th Gen fighter"
South Korea's electronics industry is very developed, which brings huge advantages to the KF-21's avionics capabilities. At the same time, South Korea is very willing to submit to the United States and they are not short of funds, so it is very easy for it to obtain a large amount of technology from the United States.
2nd, KAAN, roughly at the level of a "4.25th Gen fighter"
Turkey lacks an advanced electronics industry, nor does it possess the necessary in-depth industrial capabilities.
You dont know anything about Turkish Defense Industry and KAAN Fighter Jet
S.Korea is nothing to compare with Turkiye in Radar , Electronic and Avionic System technologies
Turkiye has its own systems such as GaN based AESA Radars , EOTS , IRST , DIRCM , EW Suite , Mission computer , HMDS , Targeting and Jamming Pods , and all kinds of Missile projects ( cruise , anti-ship , air to air , anti-radiation , ALBM , air to surface )
S.Korean KF-21 technology
-- Engine from American GE
-- AESA Radar technology from Israeli ELTA Systems
-- Terrain-following/terrain avoidance (TF/TA) Systems from Israeli ELTA Systems
-- IRST sensor head unit from Italian LEONARDO
-- CANOPY technology from American TEXSTARS
-- AMADs from American TRIUMP GROUP
-- HELMET from USA
-- Main Generator from American COLLINS AEROSPACE
-- Missile ejection launchers from British COBHAM
-- Ejection Seat from British MARTIN-BAKER
-- Wheel braking system from American MEGGITT
-- Air to Air Missiles from USA and Europe
-- Cruise Missiles from USA and Europe
even simulation link system from Turkish SDT Space and Defense Technologies
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on the other hand , except Engine and Ejection seat KAAN is full of indigenous
in 2018 , Turkiye has started TF-35.000 turbofan engine for KAAN Fighter Jet
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and KF-21 is inferior to compare with the KAAN
KF-21 doesnt have internal weapon bay for stealth flight capability
KF-21 lack 360° situational awareness
KF-21 lack DIRCM ( only SU-57 and KAAN )
KF-21 lack HMDS ( only F-35 and KAAN )
KF-21 lack full data-to-decision (D2D) capability
KF-21 only can dream about these capabilities
1 -- Superior AESA Radar based on Gan technology with 2.000+ T/R modules
2-- with AI-enhanced battlefield awareness ( 360° situational awareness with 4 AESA radars - sensor fusion with EOTS , IRST with unique configuration )
3-- high-capacity networking , AI, data fusion
4-- Artificial Intelligence Co-pilot
5-- Pilot Health Tracking
6-- DIRCM Directed Infrared Countermeasure System by high power LASER
7-- HMDS (Helmet Display System) with AI-enhanced battlefield awareness
8 --Increased-range BVR Missile (GOKHAN ramjet powered long range networked a2a missile )
9-- excellent EW capabilities with ASELSAN FEWS -- Fighter Electronic Warfare Suite
10 -- full data-to-decision (D2D) capability for multi-layered distributed team of diverse manned aircraft working in concert with unmanned types ( KAAN , ANKA-3, KIZILELMA )