So, I noticed last night that my Halfling Dragonmarked Wizard18/Rogue2 no longer rolls for heal scrolls and instead auto succeeds as if he were a cleric of the appropriate level. I also decided to look at Cure serious wounds scrolls and wands, and they too did not imply that they used use magic decide for me to activate, however cure critical wounds did (as it is not emulated by a dragonmark).
This is an awesome change, even though my halfling wizard has the umd to use cure wands, and heal scrolls.
One interesting little tidbit though, I'm able to scribe heal, and use up the scroll, only to be told I cannot cast spells from other classes (No, it doesn't appear in my spell book)