Can I change the brand of contact lenses that I use?

I'm prescribed Air Optix for Astigmatism, however I noticed that Acuvue's are cheaper. Can I use Acuvue for Astigmatism? I noticed the BC is different by 0.1. What does the BC stand for and does that matter?

BC means base curve, they have different base curves, so you should check out your eyedoctor. It should say your base curve on your previous contacts to see how it fits on your eyes