So do you still get 100 miles for booking car rentals on ac.com? Couldn't find it anywhere. If so, that would be better than the e-store for 1-2 day rentals which is mostly what I do. (My corporate is always $38-42/day.) E-store gives you 1 mile/$ spent excuding taxes.
Looks like neither posts without having to call/write, so no difference there!