I remember that I could never do an 'easy' ride on my Caad10, I'd always feel like smashing every hill, sprinting from every traffic night. Maybe its the stiff alloy feeling.
Also the CAAD 10 has a pretty short headtube, so you might be longer and lower on it, so some aero gains?
I've you had a power meter, you could do a more accurate comparison, but the real answer will be that you pedalled faster, or were lucky with traffic lights or something, or more favourable wind.
I remember that I could never do an 'easy' ride on my Caad10, I'd always feel like smashing every hill, sprinting from every traffic night. Maybe its the stiff alloy feeling.
Also the CAAD 10 has a pretty short headtube, so you might be longer and lower on it, so some aero gains?