I'd like to throw out that it's really a dumb denigration of Russian style Judo to say it's more power oriented than Japanese Judo. I don't really think that's the case. The gripping is focused more on breaking posture prior to the throw, but that actually makes the throw require less power in many cases than the sleeve + lapel version. I'm not a very strong person for my weight class, I could never generate the pull and posture break necessary to throw good people with a lapel and sleeve grip, but as soon as I started working more on getting belt grips and over the back grips I found I needed a lot less strength to control people and throw them. It's simply more mechanically efficient to keep someone's posture broken to be resting a lot of your bodyweight via an over the back belt grip on them than it is to do it by pulling them down by a single point of contact on their lapel. Lapel grips have other advantages, mainly flexibility in which throws you have available, but they're far from optimal compared to belt grips for big turning throws. People say that style is a power style because it requires less subtle kusuzhi once you have the grip, and that's true. But the reason your kuzushi can be less subtle is because your gripping is more efficient for transferring power and pulling off hip throws (or big reaps).
Even the pickups and ura nages you see Eastern Bloc players using are not really power moves in the sense that you have to have a ton of power to use them, it's not that hard to pick someone your own weight up if you use good technique, but it can't be done efficiently from a classical grip. The fact that uke feels so helpless once you lock in the strong belt grips doesn't mean it's a power move, it means it's an efficient means of controlling uke's balance. So the thing isn't power vs. no power, it's where you apply power. Russian style, you're using power to attain your dominating grip and then the throw is easy. Japanese style, you take a very standard grip but then the throws often require tremendous power to pull off unless you hit them perfectly.
