From the stats, looks like a relatively poor match on both sides, with the big difference being that Venus won most of the points where her first serve went in, and Justine won less than half on her own.
"Playing aggressive tennis ... that's always the way to go, if you ask me." - Venus Williams, May/2002
"Some shots I will hit hard but not every ball. I'm not just using my power." - Serena Williams, Oct/2002
Venus played relatively well, strong serves and the backhand was formidable. The forehand is STILL a weakness that can be exploited by Serena as is the second serve. I don't think she can beat Serena if they meet in the final.