I have both a Dogma 2 and a Dogma 65.1.
When I first purchased my Dogma 2, I was stunned at how it rode. It combines both comfort and speed. While it is NOT the fastest bike from Zero to 25 mph, it is the easiest bicycle I've ever rode to sustain a speed. The cycling mechanics are incredibly smooth on this bike and the same is true on the Dogma 65.1. Once you achieve your speed, the bike rides itself. I've also discovered that it is the most comfortable bike I've ever ridden in the drops and it is, by far, the most stable bike going down hills at high speeds (i.e. 50 mph feels like 30 mph).
The Dogma 65.1, in contrast to the Dogma 2, is stiffer and is a little faster from Zero to 25 MPH. When I take long endurance rides (over 60 miles), I take the Dogma 2 because it is (slightly) more comfortable. However, I prefer the Dogma 65.1.
As for the finish, I don't think there is any bicycle finished as well as the Pinarello Dogma's. If you want the Italian finish, you need to own a high end Italian bicycle.
Lastly, if up to date engineering is important to you, then you get it with the Dogma 65.1. No other bike has 65 ton carbon or the degree of asymmetrical design. While all this engineering means nothing if it doesn't ride well, the truth is that it rides superbly.
The one downside to the Dogma 65.1 is that if you try it, you will "NEED" to own it.