Why is the T-64A same BR as the T-72A with very big differences? (RB)

Machinery of War Discussion Ground Vehicle
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22

The 279, an 8.7 at 9.0 because people just wouldn’t learn to shoot its hull with HEATFS.

23

I’ll take the 279 to 10.3 happily. It’s an amazing vehicle, and much better than both T-72A and T-64A.

24

What are those even for?