I like W17 better. Loved how both man would do everything in their power to beat each other and at the end, Austin needed help from McMahon to win. W19 is awesome too. Austin sells the third Rock Bottom like he has just been shot in the back lol. Great stuff.
Rock was the better performer in W19 but Austin was the better performer in W17 IMO. I still need to watch their first Mania match, it must be good considering it made KOK's top 50 Mania matches :P