To answer the very first question in your post, I would put money on russians being stronger in the strength lifts (not just limited to back and front squat). Not due to any ignorant "Russian power" type ideologies, just from what I understand of their different training styles. However if your talking only back and front squat, I would suggest there front squats would be relatively the same, however back squats would fall in the Russians hands.
Dave, Where did you see the video of Plamen Boev and the 280kg deadlift?