WinDVD 9 vs. PowerDVD 8?

Which is better WinDVD 9 or PowerDVD 8?
Has anyone used WinDVD’s ALL2HD trimersion for upscaling to HD? How about PowerDVD’s Movie Remix?
Opinions? Do they both work well with Vista 64?
Thanks for the feedback.

I have Power DVD 8 Deluxe on Vista Ultimate SP-1 64Bit and 32Bit and Windows XP Pro SP-2 32Bit. It works fine. It looks like Vista MCE copied Power DVD. Too similar to be a coincidence.