Regal Procession?

[Legildur]

In a PbEM game I'm in, we obtained a scroll of Regal Procession, but not exactly sure what it does.

On the WotC site I found the following references:

From Magic of Delight and Despair (part 1)

Regal Procession
Conjuration (Creation)
Level: Sor/Wiz 6
Components: V, S, M
Casting Time: 1 round
Range: Close (25 ft. + 5 ft./2 levels)
Effect: One mount/level
Duration: 2 hours/level (D)
Saving Throw: None
Spell Resistance: No

You create a procession of finely arrayed light horses for you and your companions. They come with a bit and bridle, riding saddle, saddle blanket, ribbons, adornments, and a banner. The caster selects the colors of the horses and the livery, either or both of which can include a heraldic or personal symbol.

Material Component: A bit of horse hair.

But I also noticed that the same 'spell' appears in the Spell Index and procides the following:

regal procession
SpC 172
conjuration (summoning)
paladin 3, sorcerer/wizard 3
close (25 ft. + 5 ft./2 levels)
effect

What's the difference between the two versions?