Big giveaway for the T-64 is the road wheels, they're much smaller than those on the T-54 & T-55 and they're evenly spaced along the hull. The T-54, T-55 have only five road wheels compared to the six on the T-64 and the first and second wheels are spaced further apart than the second through to fifth road wheels.
The T-62 on the other hand, while looking "generally" similar to the T-5x series (for example, still having five large road wheels), has evenly spaced road wheels from 1st to 3rd and then a larger space between 3rd & 4th and 4th & 5th.
The T-54 & T-55 look like an overgrown T-34 with a domed turret, no surprise as they are an evolution of the T-34 design via the T-44. Even the T-62 is a child of the T-34 as it is nothing more than an evolution of the T-55. Tank designs of that period accepted into Soviet service tended to be evolutionary developments of older designs rather than revolutionary developments until they accepted the T-64.
Going back to the Tiran, apparently Israel only had about 100 captured T-62 MBTs available for conversion to Tiran-6 standard, hence why we don't see many of them compared to the many hundreds of T-54, T-55 variants in Israeli service.
And going back to the movie, another factor that added to the confusion was the tank had a five-man crew whereas the T-5x series only had a four-man crew (driver, commander, gunner, loader).
Sheesh, once a tank-head, always a tank-head
I like military smallarms too
