Both the M1 Abram and T-14 Armata are highly capable tanks, but they possess different strengths and weaknesses. The M1 Abrams has proven technical superiority in mobility and cross-country performance and has been in service for over 40 years. The T-14 Armata, on the other hand, has superiority in crew protection and survivability, better armor protection with unmanned turret, larger main gun, advanced electronics suite,and more futuristic design compared to M1 Abrams. However, the T-14 is a relatively new design with several issues and had not yet been adopted by the Russian army as of 2022, with its future uncertain due to technical difficulties and funding constraints.
Eventually, the true performance of the two tanks will depend on many factors and can only be determined through real-world testing and comparison.