Spontaneous prestige casters and relearning spells?

[Ambrus]

I'm just wondering whether spontaneous casters, such as sorcerers and oracles, can continue to learn a new spell in place of one they already know at each even-numbered caster level if they instead advance in a prestige class that improves spellcasting. Is the ability to relearn spells an intrinsic aspect of their spellcasting or not?

[Kierato]

Ambrus wrote:

I'm just wondering whether spontaneous casters, such as sorcerers and oracles, can continue to learn a new spell in place of one they already know at each even-numbered caster level if they instead advance in a prestige class that improves spellcasting. Is the ability to relearn spells an intrinsic aspect of their spellcasting or not?

It is a part of the sorcerer class as far as I can tell.

[Tom Baumbach]

Yep, everything listed under "spells" for the class advances.