For either the B or C magic priority, are the benefits gained for being an Aspected Sorcerer worth what they give up as a Full Mage at the same priority? Is it even close? I don't think so and I don't think you've addressed that point yet.
For Human and Elf, no, but for Ork and Troll casters, most assuredly.
A: Troll
B: Attributes
C: Skills
D: Aspected Magician
E: Resources
Or
A: Attributes
B: Aspected Magician
C: Ork
D: Skills
E: Resources
Either may not be a munchkin "optimized" build, but it could be functional. Just not my cup of tea because I personally want both casting and conjuring (don't really give a frag about enchanting).
Well Full Mage is not a choice at Priority at D so that's an apples to oranges comparison. We can discuss that, but it's not what I asked. So I suppose we'll consider your very uncommon choice of an Ork caster.
With Magic Priority B and no special ability points, he's got an Edge of 1 and the Magic attribute listed. And his racial limit for both Logic and Charisma is 5, so both traditions are an equally poor choice for him. Flip a coin.
If he went Full Mage B, he'd have a Magic of 4, 7 spells and Sorcery and Counterspelling at rank 4 before spending skill points.
If he went Sorcerer B he'd have Magic 5, no spells and the Sorcery Group at 4 before spending skill points.
Both have great drain stats and spend skill points similarly maxing Spellcasting and Counterspelling, except the Mage throws a few points into Conjuring and Binding because he can (lets say a 3 in each). They not only let him summon, but also use bound spirits to aid his spellcasting. The sorcerer gets to spend some points on non-magic stuff. The Mage takes no Enchanting skills because he thinks it's dumb. The Sorcerer agrees.
Then we get to Karma. We'll assume neither takes negative qualities. The Sorcerer still doesn't have any spells so he drops 25 karma on 5 spells (or 4 and a mentor spirit) while the Mage gets to spend his points on Quick Healer, Mentor Spirit, Aptitude Spellcasting so he can have a 7 . Then he drops 2 more karma on a new skill to make up for the extra point he put in Spellcasting and he has 1 karma left over.
So lets compare:
- Things better for the Mage
The Mage can astrally project
The Mage can conjure spirits but not great, so probably only force 3 or 4
- The Mage has access to conjured spirit powers at force 4
- The Mage can use bound spirits to aid spellcasting +3 dice
- The Mage can use bound spirits to sustain his spells - 3 turns
The Mage has 7 Spells and a Mentor Spirit vs 5 and no mentor (or 4 + MS)
The Mage's heal spells and first aid roll with +2 dice and he also rolls 2 extra dice when healing stun or physical damage
The Mage's Spells are harder to notice (Spellcasting-force = threshold to notice)
I broke out the conjuring stuff because I don't expect force 3 or 4 spirits to fight, but their powers could still be useful and they make a material difference for Full Mages spellcasting in tight situations.
Things equal for both:
Both casters roll the same dice pool when casting spells (Magic + Spellcasting)
Same or equal attributes
Same gear
Things better for the Aspected Mage (Sorcerer):
The AM can cast at 1 higher force (5) without risking Physical Drain.
The AM has Ritual Sorcery at rank 4
The AM has 6 more skill points to spread around on non-magical stuff.
These list may not be exhaustive so feel free to add to them, but I think they highlight pretty well what has been traded for in choosing one archetype over another. And really, it's not even a contest. As written, full mages cast more and better than dedicated casters, and that's messed up.