You can't go wrong with either plane... the upside to the Vision is that it is in stock now. But the Yak's are purported to be around the bend...

There are 2 videos of Chip flying the Vision on his website:

http://www.chiphyde.com/html/vision/visionvideos.html

What impressed me with these videos is the wind was howling, but the plane doesn't seem to show much adverse reaction... not getting bumped around and tracking true... Of course the low speed harriers (upright and inverted) and the harrier circles are something too...

These two planes will be neck and neck for top 50cc Monoplane ARF of 2005...