Sharapova wasn't at her best in YEC 07, she was just coming back from a terrible fall due to her shoulder injury. She was getting back there but she wasn't nearly as good as she was at the AO 2008 where she crushed Justine! Even tho Justine didn't play bad, I feel that her game was there but her heart wasn't therefore I wouldn't consider that match Justine's peak. Where Justine played really well throughout the USO 06.
one bad match to Jankovic and that's all.
Maria at the 2007 YEC absolutely crushed everyone until the final vs Justine, mauled many of them. One 3 setter with Kuznetsova, but she won handily in the 2 victorious sets and doubled Kuznetsova in winners that day. A field with only top players. She wouldnt be capable of this with anything less than "peak" form, especialy as she is very rarely able to do something like that for a whole tournament. Yeah fine to say the 2008 Australian Open was even better, but beyond any doubt the 2007 YEC is probably one of the 5 best tournaments of Maria's career (while it was also a good tournament for Henin it probably wouldnt even be one of the top 15 tournaments of hers). No doubt this is the closest thing we ever saw of peak Maria vs peak Justine, that or the 2006 YEC, if not absolutely there, closer to it than anything else.
As for the 2006 U.S Open that is by far the worst of the 5 major events Henin played that year. The fact she would have lost 6-4, 6-2 to Jelena freaking Jankovic who is her pigeon, and who she has never lost to, in the semis, tells you all you need to know. It is true she looked pretty good until her quarterfinal with Davenport but she seemed to incur an injury of some kind in that match, and her serve went to crap and was Dementieva like her last 2 and half matches, and with a serve that bad you cant win vs someone like an in form Maria. Henin actually played much better in her 2008 Australian Open defeat to Maria than the 2006 U.S Open one, and Maria in fact managed to win that one even more easily (probably the match of Maria's career tbh) so if you want to pump up Maria you are best to speak about their Australian Open match as the best showcase of Maria's abilities vs a somewhat good Henin. The idea Henin was playing great in the 06 US Open final or in general at that event is simply ludricious. She was even playing better tennis at the 2001, 2002, maybe 2004, and maybe even 2000 events where she went out in the round of 16 each time than in 2006 where she finaled with an easy draw consisting of a bunch of clowns, granny now non contender Davenport who is an easy matchup and prime Henin's pigeon anwyay, and another pigeon and headcase and new to being a contender Jankovic.