It has relikt ERA that will stop the M829A3, and indicated armor is 800mm front against APSFDS and about 1350mm vs HEAT. It gives comparable protection to western MBTs for much less weight. It also has an armored ammo compartment in the bak of the hull giving the same level of protection as the much famed turret bustle. It has state of the art FCS that is not inferior to any wesern model. Given that the 125mm gun fires modern svinets-2ammo it has the same performance as the L44 and L55 (800mm pen). It also has an ATGM that gives it a range advantage. The T-90MS can run circles around the challenger 2 and M1A2 SEP and the same agility as the leopard 2A6. It is also a very low logistical burden. The T-90MS seems to be the best for a long term attrition war while for short military operations thechallenger 2 and leopard 2A6 are the best. The T-80U and T-90 cant be compared to wesern tanks since they're already obsolete.