Righteous Orb vs Fiery Core

Side by side:

Set your class weights in Preferences to see which is better for you.

Δ is Fiery Core minus Righteous Orb: green where Fiery Core is better, red where it is worse (a lower required level is better; speed and sell price have no better side). Total Stats adds up Str, Agi, Sta, Int and Spi.