I did not look at the third one, but the other two seem to be the same, and it seems that they just defrag, not rebuild the indexes (the store procedure was way too long to me to pay attention) :)
"The five senses obstruct or deform the apprehension of reality." Jorge L. Borges?
"Premature optimization is the root of all evil in programming." Donald Knuth, repeating C. A. R. Hoare
"To die for a religion is easier than to live it absolutely" Jorge L. Borges
