Update: First thanks for all of the responses. They were appreciated.

What I’ve done is taken my custom built and fitted bike as the base. I then used the Park Tool size chart and carefully measured all the elements using their reference standards. The road bike I picked to work on was the one closest to the base in terms of frame size as measured by top tube and seat tube.

Both bikes have the same seat, Dura Ace component group and crankset. So, I then set about trying to duplicate the measurements from the base to the other bike. It took a little over two hours. (Even though nothing was being cut, I was measuring twice). Today, I took the finished work as my commuter. I must say, it felt fine. But, as several of you have pointed out, it wasn’t the same ride, which I wasn’t really expecting. In fact, the first thing I noticed is how much more compliant the wheels on it were. The base bike has Ksyrium SL wheels and the test bike has Mavic Open Pros on DA hubs.

So, long story short, I’ve several reactions to this whole exercise. First, having the measurements of my best riding bike seems worth the investment. Should I ever need to swap something out, I’ll have a starting point for getting it right. Second, I think there is a SLIGHT advantage to having all my roads bikes set up as close as possible to one another. And finally, there are so many things that go into how a bike rides and feels, that the only way to get a carbon copy is to get two of the same bikes, all set up in exactly the same way, and with the same equipment down to the same inner tubes.
With that said, I’m glad I took the time to do this. It gives me an excuse for N+1. When asked, “But don’t you already have a bike like that?” I can answer, “Yes, but they won’t ride the same.” And, I’ll say this from a position of real knowledge.