What tank is better? T-90 or M1A1?

I have recently been looking into russian military capabilities. Now, im soundly convinced that the USA can pretty much dominate the air. In an event where America had to fight the Russians, my guess would be that gaining Air Superiority would take priority, and in fact wouldn't be all that difficult. One thing however is that the Russians do occasionally come up with good weapons (despite their notoriously low production quality) that can hurt us. In the event the Russians try to go for a ground front, mainly made up of tanks, the response would be to enact our Apache Attack Helicopter divisions to decimate the russian tanks. However, I find it doubtful that we have enough Apaches in our arsenal to completely fend of the whole of the Russian tank divisions. Undoubtedly, we would likely use lots of our air power to take out as many tanks as possible, but I imagine that our air front would be quite busy fending off any russian aircraft trying to dominate the air space. So that leaves us with using our own tanks. Right now, the Abrams is our main battle tank. I believe that its a solid piece of weaponry and could stand up to large numbers of tanks. Unfortunately, we don't have nearly enough tanks to match Russia. Russian battle tactics dictate that in an encounter with other enemy tanks, they go for a 9 vs 1 tank battle ratio. In other words, they try to manipulate the field so that its 9 of theirs to every 1 of ours. While the Abrams is a notably strong tank, its very hard to say who would win. From what i understand, the current main battle tanks in Russia are the T-80U and the T-90A Vladimir. These tanks in my opinion are real solid weapons. What i want to know, hands down one on one, who would win in an encounter. Also, if the abrams wins, how many would it be able to take on at one time. IF the russian tanks win, how many Abrams would it take to defeat one then.