Can anyone tell me the differences between the two cameras? I may have the opportunity to purchase a 700 and my church has the 750's, so I'm kind of familiar with the 750.

I used to use a pair of 750s and a 700 at work but have been retired for a few years so this is strictly from memory.
On the outside they were identical. The only difference I can remember is that the 750 had one more recording format option than the 700 did.
I might have a chance to check them out sometime this week. If I do I'll look into it further and report back.

Finally had a chance to go into my former workplace and check.
As I suspected, the only difference is that the 750 can record in DV-AVI (720x480) format in addition to the various HD formats. The 700 records in the various HD formats only.
Other than that the cameras are identical.