Enchanting versus inscribing spells

There’s a difference in the way that Nephilim inscribes spells and Enchanted Magic enchants spells. Previously I thought of possible ways to reconcile it, but since these don’t strictly contradict except on one or two points (see below) then you can use the rules as written.

Having a spell inscribed on the caster's aura or enchanted onto an object obviates the need to design the spell in advance. This substitutes for a copy in a grimoire and provides other benefits. An inscribed spell is generally much faster to cast or prepare, while a spell or procedure enchanted onto an item has its POW fixed at the moment of enchantment.

Ritual Magic and High Magic spells may be inscribed on the caster’s aura. This lets the spell be cast using Casual Magic instead. High Magic cannot be inscribed unless the caster can cast it without boosted Ka and is still limited to the corresponding day of the week.

Ritual Magic and High Magic spells may be enchanted onto an object as Casual Magic in a similar but different fashion. This fixes the spell’s POW at the moment of casting, which remains static each time it is cast. High Magic enchantments have reduced power thresholds and may be cast on any day of the week.

A single generic Summoning spell was included in EM, suggesting Summoning inscriptions would be cast like Casual Magic and enchanted onto objects too.

Enchanting a Black Stone procedure onto an athanor fixes its POW at the moment of enchantment and allows even the unenlightened to prepare it with the appropriate Craft specialty. Enchanting a work of art makes its magic permanent, as the POW was already determined when it was created. 

Inscribing alchemy procedures onto the alchemist’s aura reduces their preparation time to one day if it was longer (stated in the Unpublished Alchemy Rules). Enchanting/inscribing a meditation onto the alchemist lets him prepare it in five rounds or one minute, but the POW is recalculated at each casting; this supersedes the one day reduction for inscriptions listed prior.

As an in-character occult explanation/justification: “Inscribing a spell on your aura is essentially memorization. You understand the spell so intuitively that you can cast it as Casual Magic, or you understand the procedure so well you reduce preparation. Enchanting a spell onto an object bakes the spell’s aura into the object’s instead. It’s a snapshot of the spell as it was first cast, not a memorization of how to cast it. That’s why its power is fixed and doesn’t wax or wane with astrological shifts.”

Just wanted to clarify that.