In compare to BVR fightingcapabilitys the Viggen has some greate advances. For example The radarn on Viggen is the 70-cm diameter Erikssons Radio System PS-46/A, a high power X-band pulse-doppler medium PRF radar whit an capability to look-down target least 50km and track down several targets while searcing, it also got an high resistance to EMC.
The Mig-23E Radar is the Jay Bird (named by Nato) has an searc range of 30km and tracking range of 20km.
The weapons comparensen is that the Viggen using the RB71, a licensbuild version of the BAe Sky Flash Missile from UK. The Sky Flash whas developet from the US AIM-7E2 Sparrow whit more advanced homing system and improved fusing, plus it has reduced warm up time from the US 15 sec to the UK 2 sec. the Sky Flas has also greater capabilitys agains glint and heavy electronics contermeasures. It has the ability to attack targets that flow as low to 75m above the ground and launched from 100m up to high LVL flying targets. The RB 71 also got an better improved motor and guidens system by SAAB Missiles company. The missiles weight is 193kg and has an warhead of 30kg active radar promixy and impact delay-fused blast fragmentation.
The range for Sky Flash is from 0.5km to 50km and to the RB71 is may by a little longer because it has an improved motor.
The Mig-23 medium-range missile is the AA-7A/B, codename Apex is also an development (probely stolen) of the US AIM-7E Sparrow III Missiles but whit greater manoeuvrabilityand and has an infrared homing system instead of radar. The Missiles weight is 300kg and has an 40kg promixy and impact fused warhead. The range for AA-7A is 20km.
There is also an more improved typ called AA-7B that are 20kg heavier than the original but has an semi-active radar homing system and got an range of 55Km.