I got some of my work computers to play Go at lunchtime. I was curious as to how GNU Go development is going, so I got the latest development release (3.3.22) to play the 3.2 stable release. Both were compiled to play at level 10 by default, but with otherwise standard options.
Expecting the 3.3 version to be better, I gave it white. All games were on 19x19, Komi was 5.5 moku.
Overall, there were 18 wins for white, 13 for black.
So it looks like 3.3 is a little stronger, but not overwhelmingly.