echo this, corsa controls are lovely and did prefer them to my gp5k's i rode for a short time, like you and jb say, 5ks just feel dead in comparison even if grippy and fast
didn't get a puncture on them either, which was good, because they were neigh impossible to get on and off a kinlin rim
Genuinely riding more my alloy "training" wheels with corsas than the deep carbons with GP5000. Tires just feel better, especially in bumpy roads.