Great find PW!
The Sambo guys have a really interesting approach to judo, and really shook up the sport when they started taking olympic medals off the Japanese. At the moment my Judo instructor is Japanese, but I originally learned off Europeans who had a style that incorporated a lot more of what you might call wrestling. The ways of setting up throws are very different between the two styles, although I wouldn't say that either is more effective intrinsically.
A sixth Degree I trained with a few times told me once that the Japanese style is suited to people with more flexible hips than most Europeans possess, while the Eastern European style is based more around forcing your opponent off balance and using tighter "clinch-like" grips to dominate your opponent. You can definitely see that in these videos, especially the different set ups for O-Goshi in the first video.
Personally, I prefer a more wrestling-style approach to my stand-up Judo. I like getting tight to my opponent's body and trying to bully him. This might just be indicative of my overall lack of skill in stand-up though- apart from my seoi-nage I rarely score big throws and rely on smaller scores and ground-work to get me through.