Any real life experience?
Not sure what you mean by comparing the two. They both do different things although the GParted distro contains Clonezilla.
I've used clonezilla plenty of times for backing up and restoring hard drives containing just Windows, Windows + Linux or just Linux. Works very well. I think we've all used gparted as a program, not sure how many have used it as a live cd. I haven't.
I need to resize FAT32 filesystem so that it grows to fill a newly resized (bigger) partition. GParted does it (Partition -> Check). But, I don't know if Clonezilla does it automatically when it copies to a bigger partition.
Good question. First off, I will admit I've never tried this. But according to the docs, it's possible but you have to use expert mode and then choose the option -k1.
http://clonezilla.org/clonezilla-live/doc/03_Disk_to_disk_clone/advanced/05-advanced-param.php
I used -j2 and -r from the first screen, and -k from the second screen. Clonezilla did not expand the FAT32 filesystem. I didn't want to use -k1, because partitions have been already adjusted manually.
Anyways, I found that Clonezilla has 'fatresize'.