Ideally the speakers should be compared in their optimal sounding position assuming this is a position you are willing to live with.
In my case, the system/speakers reside within the main living space and therefore have to sound good in the space allocated to them. Fortunately, I can place them at least 3’ out from the front wall and at least 6’ from a side wall. So far, this location has worked pretty well for 2 different floorstanders and 2 different bookshelves.