I absolutely love the point system at the end of the book that gives you an idea of how to mix and match the games. But I was wondering, does using the magic system in Mage, in your experience, make spellcasters more powerful compared to non spell casters?
The spellcasting rules from Mage certainly mechanise it more; being able to 'break' spells to avoid harm makes it stronger but the misfire table makes it riskier.
Ultimately, because there's no 'numbers' or similar associated with any of it - no 4d6 vs 3d8 etc. - power level comes entirely from the narrative. It's up to you as a group to decide how powerful magic is, and if you have a mix of games then you probably want magic to be less powerful than if you're just playing Mage on its own.