Alkhalid is their prime worry for many reasons..
Quite advanced FCS (multi process FCS in AK 1)
UNKNOWN type composite armour and ERA
BMS and netcentric warfare capability
Lethal ammo and ecs
Excellent engine+transmission combo makes it a standout performer in desert and plains.
For those who don't know, FCS, armour and netcentric warfare capability in AK 1 is enhanced by magnitude when compared to baseline AK.
Compared to this, the Indian t-90s falls short in these parameter s:
* obsolete simple FCS
* limited battlefield awareness
* ecs issues
* thermal imager not available on some of the fleet
No BMS on t-90s
* obsolete ammo with questionable HEAT only capability, no modern apfsds
* no all round hunter killer ability for multiple target engagement
* no panoramic sight for all round awareness
* limited datalink with intercom only communication
Lastly, there is no auto tracking in Indian t-90 fleet UNLESS they go for the MS version which has LIMITED tracking function for maingun only, unlike in AK with main gun and remote control hmg both have auto tracking available.
Vt-4 was tested for replacements but the team was not impressed with performance. It is at best on par with AK 1 with no other advantages apart of slightly powerful engine.
Cleverly, HIT has tweaked the 6td-2 with new torgue convertor for faster accelerations which compensates the performance difference.
The entire PA fleet is using components, subsystems and FCS modeled on AK FCS system. This includes the type 85, t-80ud, Alzarrars.