You are forgeting one thing: the 911 competes againts the AMV8 but the AMV8 does not compete agaisnt the 911.

I.e, the AMV8 may be a competitor to a 997C4S with PASM for example, but it cannot compete with a 997S-20mm, or a 997GT3 or a 977Cab or a 997TT, etc, etc... so not likely to give the 911 a run for its money at all, it will compete somewhat agaisnt the most GT'ish of the 911 models, but thats about it, and even then the 911 would still be the 911, the AMV8 is a new kid on the block that has a lot to prove in terms of reliability, delaer infrestructur/service, image, etc... the 911 has seen many come and go over its 40+ years of reign.