Besides the journal, what are the differences between ext2 and ext3?

I just saw [an answer question about filesystems for embedded hardware](https://raspberrypi.stackexchange.com/a/1169) on another Stack Exchange site. The question was "What file system format should I use on flash memory?" and the answer suggested the ext2 filesystem, or the ext3 filesystem with journaling disabled a'la tune2fs -O ^has_journal /dev/sdbX This made me wonder... What would the advantage be to using ext3 (with journaling disabled) over ext2? As far as I understood, the only real difference between the two was the journal. What other differences between ext2 and ext3 are there?