Going from the second to last, to the last word of power.
Inferno
Saving throw reflex half, spell resist yes. 1d8/caster level, max 20d8.
True Fire
saving throw none, spell resist no. Target restrictions selected. 1d6/caster level, max 20d6.
More than just changing the damage, this means that you can hit characters with Improved Evasion and characters/creatures with a high spell resist.