I'm afraid it wouldn't be a good description, given it is my first carbon bike. But I can offer my POV in comparison with my old alu bike.
Previously I had a size 50 no-name 7005 Alu bike which main issue was that it didn't give me enough drop (or as much as I would have liked). This is a XS Gallium Pro, which is somewhat close to a size 47. I am quite flexible, so I finally have enough drop and feel comfortable in the hoods and in the drops and I can sprint more aggresively. Not that it is my strong point, given I am a 164 cm, 51 kg weakling climbing specialist, but any style points are big on my book :-D
I am mainly a long distance rider. I completed many 200+ km rides in my old bike, and had enough "carbon-cushion" from the carbon seatstays and upgraded carbon seatpost, but this thing is an absolute beauty. I can "feel" the road much better, however it is not harsh or uncomfortable. I couldn't speak about stiffness since I don't produce anywhere near the power required to flex any frame, but comfort is really good without losing communication with the road.
In the weight department, I was able to save almost 1 kg in comparison to my old aluminum bike (I transferred all the components, except for saddle, stem, chain and bottle cages), which is huge. The alu frame (without fork) weighted around 1.4kg. This XS marvel weights around 850 g!
My only complaint with this bike is purely aesthetical as I really dislike the round metal piece on top of the seatpost. WTF is up with that? Other than that, I am absolutely in love with her and plan to gradually upgrade its components to SRAM Red so I can put the Rival back in the alu bike and have a bad-weather bike available.
I am now at 7.1 kg and plan to get it to 6.8 kg over the course of this year.