Sorry it took me so long to reply.  
 
I think the Carbon aero is certainly harder to ride and balance than the Gold Rush, but easier on hills.
 
May be faster, but I'm a pretty slow rider, so not much of a comparison.
 
Just did a 45 miler at the lake, and did the steepest hill climb three times, you know the road when you turn from 7-ll and then go back to the stop sign, and go straight.
 
I really like it on hills.  Its a VERY different feel to the ride depending on how much you recline the seat.  It does not feel as solid
as the Gold Rush but you with the high bottom bracket you can use more of your legs, its more of a full leg press feeling than
the Gold Rush, which focuses more on your quads, like a DF.
 
Anyway, hope this isn't more information than you asked for.
 
The Weight of the CF Aero is 21 lbs.
 
Later
 
David
 

David,
 
In this group there's no such thing as too much information. Hope to see you on it soon. You know we all want to ride it.
 
Richard