I recently upgraded from XL to 10 and I am very pleased.
I agree that its not very different, but some of the things I really like are:
I find it much faster - it opens much quicker on my machine that XL.
The changes to the PhotoFrames are really nice and I use it a lot.
I bought and upgrade onlione and it was extremely affordable at www.ulead.com

:-)
Leonora