Is there a standard hierarchy when two supplemental books contradict each other?

The spell, Energy Vortex, is found in:

  • Complete Divine (p.164) as a 4th level Cleric/Druid spell (published May 2004)
  • Spell Compendium (p.81) as a 3rd level Cleric/Druid spell (published Dec 2005)

In both books, the spell does the exact same effect/range/damage (choice of acid/fire/electricity/cold), aside from CD allowing Sonic as a 5th choice for damage type.

Since these books were published more than a year apart, I assumed this was more a correction than a typo. Is it standard to use the most recent book as a general hierarchy, or is there another, more preferred method?