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I have a set in 700C that I've never used, so I can't tell you. They look... okay, definitely more Zaffiro than GP 4000. They certainly don't feel as nice in hand as a tire I would normally use, but they were intended for a budget fixed build that I never ended up doing.
I did buy some in 28 mm 650C with black sidewalls for my Softride though, so whenever that's finished I'll be able to give you some feedback.
If you're still looking for some, Bike24 has 25 mm Paselas for really cheap.