Amelia ekes this out with her net game, especially since she could use the S&V as more than just a change-up.
This is largely due to her serve, and not her net-game. The slice out wide was very effective on grass.
On the other hand, Justine's sub-50 first serve percentage hurt her more on this surface than anywhere else.
I don't think Amelie's net-game was superior to Justine's. Her transition game was a bit better; Justine's volleys were more effective.
The only thing that kept Justine close in the third set of the Wimbledon final after her serve, return and forehand deserted her was her net game.
They split their grasscourt match-ups (Mauresmo winning on the slower Wimbledon grass and Justine winning on the slicker Eastbourne).
Both matches could have gone either way. Outside the Wimbledon loss, Justine actually had a better grasscourt record. I call this a draw.
That said, peak Justine would blitz peak Amelie on grass; she just couldn't sustain that level for more than a set in either of those matches.
Slowing down the Wimbledon grass helped Amelie more than it helped any other woman.
Allowed her to hit junk with her compromised groundstrokes on the baseline until she could sneak to the net or have her opponent make an error.