Wake, Northwestern's is actually less than Loyola's, according to the figure I've seen.
Northwestern = $1,495/unit where one class is one unit, plus $266 per lab.
Loyola = $16,100.00 full time plus fees, or $655/credit hour, where one science class is generally 4 credit hours (3 lecture plus 1 lab).
So the way I see it, either you go full time at Loyola for 2 years (since you won't be able to do it in less than that just due to the sequence of chem + ochem) and pay $32,000, you go part time at Loyola and pay $2620 for each class part-time (which ends up being $20960 for the very basic pre-med classes), or you do Northwestern on one of their schedules (four quarters, five quarters, or six quarters) and pay $14088 for the entire program (I am not factoring living expenses or fees into any of these calculations).
But I'm biased because I went to Loyola for undergrad, and am stoked about beginning Northwestern's program this fall. 🙂