Still Cervelo or Specialized Tarmac?
To know the difference?
Not wanting to hijack this thread, but just to add someone else's experience on this question.
I have a very similar Parlee since May 2012, which replaced a 2011 Tarmac Pro SL3 for me. Purely subjective to my senses, the Parlee Z5 SLi feels noticeably improved over the Tarmac...but this is somewhat incremental rather than exponential leaps and bounds. The Parlee is just as quick and responsive and stiff, if not more so, and it does it at a higher comfort level. It handles very precisely and surefootedly, but the Tarmac never gave me a problem either. Climbing? The Parlee seems to leap up the hills when I have the legs to push it, especially after adding very lightweight carbon wheels. Bottom line, the Tarmac SL3 was a very fine ride, but I was in the market for something different. Tested the Parlee and a Colnago or two. The Z5 SLi just kind of disappeared underneath me on a long test ride, and my mind was made up. It does everything very very well, exceeds my meager abilities and engine.