I lean this way but would need to read up a bit more on the Challenger. Even if Abrams gets penetrated to still have a reasonable chance of no dying horribly. It's a bit harder to compare Challenger 2 as it hasn't been used as much or had actual tank battles which did happen GW1. It's not so much crappy T-72's couldn't see let alone penetrate the Abrams more how fast they took them out while driving 50kmh. And that was almost 30 years ago. Armata was likely to expensive, didn't work or work well enough outside test conditions to justify the cost.