I have had a chance to put about 30 miles on the Pinarello. It is really hard to believe how responsive the bike is. The bike is much stiffer than I am used to riding. While my Gios is also a steel bike, a combination of the compact geometry, carbon fork or overall construction leaves a mushier feel. The 9 speed Ultegra drive train is truly whisper quiet. There is some chain rub in the 12 and 27. I think that may be a function of the 10 speed front derailleur with a thicker 9 speed chain. I can manage with 13/25 although hills are a little tougher.
Based on my two test rides, I am ready to bring the bike to the office for occasional lunch time rides. I think I can get in a pretty good workout in an hour.
However the Gios is certainly preferred for time in the saddle. It fits me great and I love the compact crank at 10 speed drive train. I notice the missing gears on the Pinarello. I also like the power feedback. I don’t use the data for interval training, but like to be able to quantify my workouts precisely.