Thaumatology Sorcery - Switching Between Attack Spells

[Yako]

Sorcery is build using the Rules for Alternative Abilities from GURPS Powers, so I had a question regarding the switching of spells, particularly, one attack spell to another, as might often occur in combat.
Sorcery states that only if you recast the same spell you get to cast in only one second.

However, GURPS Powers has this passage regarding alternative abilities:

1. It’s impossible to use the abilities simultaneously or have a Link
(p. B106) between them. To change settings requires a Ready maneuver.
After switching to an attack (Affliction, Binding, Innate Attack, Leech,
Neutralize, Obscure, Static, and anything else the GM views as an
“attack”), switching to a different attack is a free action. If the user can
make more than one attack per turn, he must use the same setting for
all of them

So does switching from, say, an affliction to stun your enemies to an area of effect fireball still require one concentrate maneuver + one attack maneuver, or does the rule from Powers apply?
I think that would be a good thing to explicitly clarify to avoid confusion.