without getting too much over my (and everybody else's) head, Clif is organic, so they can't can't use Maltodextrin (which is modified corn starch, not to be confused with the infamous High Fructose Corn Syrup), The different manufacturers will vary the mix of the sugar(s) according to their theories (i.e, Hammer doesn't believe you should ingest anything ending with -ose)
Read the links that Indy Steel provided, Good Stuff