From the video, the VT-4 turret gun stabiliser is extremely advance and stable that it is able to maintain stagnant while the whole chasis is rotating on uneven surface.
To be honest, this stabilizer is not camparable to Leopard A7. I have seen the Leopard A7 once, its vertical responding time it shorter, the horizontal I cannot tell.
VT-4 is impressive and i hope that Pakistan does acquire a large number of them to replace our aging fleet of Type-59's/69's, but the AK2 is supposed to be Pakistan's own indigenous effort and if it turns out that they're both the same Tank then that would only prove that the Chinese have been designing and testing our Tanks for us because we are incapable of doing so on our own.
No offensive. The whole industry of Pakistan is incapable to build high quality tanks. So do isreal. Metallurgical industry is the key of tanks from chasis, turret, gun, engine to armor. That is a huge project, if Pakistan has no strong metallurgical industry. Isreal also imports steels to build their own tanks. As I said, to develop a new version for Pakistan should be a serious problem. The best thing is to build yourselves adaptive control component for upgrading. Some parts, e.g. guns, american also use german guns, just buy one, but the controlling is always in secret, you can do yourselves and be adaptive. Once tech break through, all tank can be upgraded. So do the sensors, research the sensors, and you can sale them with the chinese tanks, When we want to save our secret, we may use a Pakistan sensor instead.
You must imported many parts for AK2. Look at K2 of Korea, they buy many parts but still buggy.To build a new Tank is much harder than upgrade one. The price of K2 is unbelievable, as well as the Altay from Turky and Arjun. I donot think this tech routine is a good choice for the countries want to develop own tanks, their price are more than 8 mil dollors per each. The isreal airforce's routine is very interesting, they buy era breaking platforms and build their own applications on the platform. When new platform is available, just integrate their applications to the new platform, Sometimes the USA buy components from isreal for their own flights.