audi and bentley comparo

I have officially been preapproved for $170,000 and now I just need to know what I want. I am undecided between the Audi A8L W12 and the Bentley Continental GT Flying Spur. I am not getting the coupe Bentley. I need four doors. If anyone has any personal references or experience with any of these cars and how well they perform (on every aspect) it would help me out greatly. Thank you.

drive them, look at them, feel them. there's nothing better than actually being in them and experiencing them for yourself. it's all about your personal oppinion.

also for a question like this, post it in the car comparisons forum, not the engineering/technical forum.