Ciba Vision O2 Optix / Air Optix

Hello, I need some help.
I wear BL Optima FW lenses for a few years now, and now doctor said
that I should get Ciba Vision Air Optix.
I tried searching to buy them online, but what I found is that they
are calle dO2 Optix in USA, and Air Optics in Europe (I live in
Europe).
Now, are this the same lenses?
Interesting thing is that I found that O2 Optix are 2 weeks
disposable, and Air Optix are monthly disposable.
However, I found on some web sites that those are same lenses (called
differently in USA and Europe) and even on one site that Air Optics
are formerly known as O2 Optix.

Can you please help me understand and order this lenses online, since
buying it off line would cost me more than double, and prices in
European shops are quite higher than USA shops.

Thank you