All valid comments
However i went with the Z750 and I totally love the thing. Most amazing camera I have ever used.
You don't say what you need in a camera so it's very hard to say what would be best for you.
The MPEG4 and past movie mode tipped the scale for me in favor of the Z750 but there is so much more.
More a users guide then a review ken covers a ton of stuff on the Z750 left out of other reviews.
http://www.kenrockwell.com/casio/exz750.htm
So many nice thoughtful features, I'm finding something new every day. Like yesterday I was taking picts using the timer using my normal process: set timer take pict, go back look at it. someone blinked go set timer take pict again. Now I just read in the above review that there is a mode where it will wait 10 seconds then take 3 pictures. Gosh that is going to save me a lot of time.
Build quality: We've dropped it twice on to pavement and it still works great. Can't complain.
Size/formfactor: Viewfinder is a big plus, none on the F10. Slimmer, better feeling. F10 feels/looks kind of cheap/clunky in comparison
Photo/movie quality: So far very happy with it but have not tried any large format prints. I too looked at all the sample pictures I could find and did not see enough of an advantage in the quality of F10 pictures to go with it's non-Mpeg4, chunky design and clunky menus.
Here's a zillion comparison shots. Judge for yourself.
http://ytun.sakura.ne.jp/F10_vs_Z750.shtml