I don't have a non-Pano Tesla to compare it against, but I don't notice any noise from the Panoramic roof while closed.
I do have a question about it though, if someone could enlighten me...
I just opened mine for the first time this weekend and this was the first time I saw the bar / mechanism that rises to stretch out a bit of a fabric "shield," apparently to dampen wind noise. That bar bounced around a lot even at 25 MPH, so I was a bit scared to keep the roof open at highway speeds. Is that bar supposed to bounce up and down significantly in the wind, or is mine defective somehow?
Thanks.