G500 gains an extra window

It has recently come to light that the new G500 will have 7 windows instead of the original 6. The 5 test aircraft (appear to have) had 6 but with an area where the new one will go with a "cut here in emergency" area behind the rear one. If the G600 is not changed (from 7) it will be difficult to distinguish which is which.

image via Gulfstream Aerospace