Ground Realistic Battles, ZT3A2 (Ratel). 8.3 > 8.7.
For reasoning, let’s compare ZT3A2 at 8.3 and AFT09 at 9.0. Let’s keep in mind that many people complain about AFT09 being too strong for its BR.
First, armor. Both of the vehicles have nearly nonexistent armor, having a 10 millimetres of steel in the sides of a hull, and 20 in the front.
Second, mobility. Both of the vehicles are wheeled, and even though AFT09 has 23.2 horsepower per ton while ZT3A2 has only 18.2, the South African ATGM carrier has better top speeds, both forwards and backwards.
Third, weaponry. While AFT09 has access to its only missiles right from the moment of purchase, ZT3A2 has two options, with the better one requiring a modification of rank 3. Additionally, Chinese missiles have better penetration, being able to destroy 1200 millimetres of steel while ZT3A1 (stock ZT3A2 missiles) can only penetrate 650 millimetres and ZT3A2 (top ZT3A2 missiles) 1 metre flat.
Fourth, convenience. While AFT09’s two-plane stabilizer is completely useless, ZT3A2 has a 7.62 mm machine gun, which is also stabilized. And while both of the vehicles have thermal imagers, ZT3A2’s one is better, having a 800x600 resolution versus 500x300 resolution of Chinese carrier’s one.
To conclude, if we were to compare ZT3A2 and FV 102 Striker, the other British 8.3 ATGM carrier, the only thing where Striker would win is its size, a couple of parameters would be the same, and in the overwhelming amount of things, ZT3A2 would win.