Well, kidds don't have the radar system like 52c. but thats pretty much only disadvantage. 52c is just a far smaller ship than a kidd. I'll compare with sovremenny.
Kidds max displacement is over 9700 tons. Sovs is over 7900 tons. So it's clearly a bigger ship. Kidd is 171m long whereas sov is 156m long.
Both have max speed of 33 knots.
Sovremenny carries one helo where kidd carries two.
Kidd has 8 harpoons, sov has 8 moskits. or 8 improved moskits for sovremenny 956EM. So when it comes to antiship missiles, one can say sovremenny is superior.
Old sovremenny has poor SAM capability, carries 48 sa-n-7 missiles, some 25 km range. improved sovremenny has 24 sa-n-12 missiles, of some 32-50 km range (exact figures range widely for it). Compared to that, kidds mk26 launchers hold 68 missiles, so that'd be a max of 68 sm2 sams (70 km range). Pretty clear that kidd is a superior anti aircraft platform.
Old sovs has two 130mm turrets plus 4 ak630 ciws. new chinese sovs allegedly have those ak630s replaced with 2 kashtan systems. Kidd has 2 five inch guns and 2 phalanx. If kashtan deployment turns out to be true, it'd be a more potent ciws soluton that what kidd has.
it has to be said that 'old' sovs are not actually that old. they may have been sitting in the shipyards for years half completed but they've served only some 5 years now. And 2 improved sovremmenies will be brand new. Opposite of that, kidds have served many years and probably would benefit from some refit, further increasing their cost.
In the end, if cost is not a factor, kidds for taiwan would mean a significant boost, especially in ASW and AAW roles, while its antiship capability would be limited, not just to sovremennies but to other chinese ships equipped with 200km range missiles.