Personally, I think both Conti and Vittoria make very serviceable, all-purpose road tires.
Serviceable is a relative term in my book. I think both companies make a lot of effort to make their product ..... not so serviceable.
I also think that Conti are vastly overpriced (much in the same way most Americans are paying through the nose for Veloflex) for a tubualr that rides like a mediocre clincher. Granted, puncture resistance is way above average and grip in the wet is simply on a class of its own. Still....
Vittoria seems to have dropped the ball somewhat due to some unclear engineering decissions giving the same helmless impresions as riding the product would. The SC was and still is a good reply to the increasing criticism from users and put their brand back in competition with its parent company Veloflex. All that at an even more competitive price. In Europe at least.
Then of course, there is Schwalbe, often overlooked, competing its heart out to beat or equal Conti.
My quible with both German companies is that although their compounds and puncture restistance are usually fine, they should understand that a more supple tyre does not need all these belts and braces. Not pure racing tyres anyhow....
Oh, BTW, Schwalbe, we want that best of yours back: the humble Milano. That tyre is a design simpleton that would beat almost all of the competition. Funnily it was a "inherited" product from a Thai take over (Swallow).
Too good for its own good it has of course been phased out.
Plus ca change,......