My campag Veloce is much of a muchness when compared to my 105; my veloce is from the era when it was the middle campag groupset, however. Personally, I prefer campag for climbing (I use my pinky to flip up gear, whilst still on the flat of the bar) but I prefer 105 for shifting up in a sprint. Of mine, overall I prefer campag because its more precise but that probably because its on my best bike with internally routed cables. Its also IMO a nicer presentation of cables (gear cables routed up the bar rather than out of the side of the hoods).