So which one do you use as an initial one? Not 3 second gust, not mean hourly? But?

I don't have the eurocodes at hand, and it's a few years since I did these calculations now.  Different wind codes use different values, or different speeds for different considerations.

It depends on the response to wind you are considering (cladding design pressure, building overturning moment, accelerations/occupant perception etc etc).

This is described in the codes, I was merely trying to propose a reason you noticed a discrepancy in the wind speeds.

Ok, thank you once again for the help.