Hi TheGreatGazoo,
Welcome to the forum.
It really just depends on what features are more useful to you. It seems that Windows Live Photo Gallery will work seamlessly with
Live Spaces.
You can compare the features from the two at these links to see which one you like better.
Windows Photo Gallery: http://www.microsoft.com/windows/products/windowsvista/features/details/photogallery.mspx Windows Live Photo Gallery: http://get.live.com/photogallery/features
Hope this helps,
Shawn