Equal building armor

[gc8 977]

Hi

I'm trying to make some of the barrier objects destructible but i don't know why one of the towers takes more damage than the other before being destroyed.

 

pic:

https://ibb.co/TcmD9hB

 

 

I put this to both of the classes:

 

 

 armor = 3000;
 destrType = "DestructBuilding"; 

 

 

but it takes different amount of shots from the tank to destroy them

 

what am I missing?

 

thx!