the problem again is, we cant know becuase these will never go up against each other
and it's also, but the main problem comparison of the tanks consist in that some of them were not baptism of fire. Actually, we can estimate T-90, Merkava IV and Abrams (M1A1, M1A2). But who is the best? it's an incorrect question, because T-90 costs about 3 million $ and Abrams - 12. They were created for performs of the different purposes, the T-90 is a assault tank while the Abrams or Merkava are defensive tanks.