Ok I miss read the post
The coils as yours are, and a younger car as Trugga was pointing out will sagg a bit less then the car you where next to as the age of the car, L reg with the same leaf suspension from new would have sagged considerably .
From new they would have both been the same give or take mm's.
The car you saw nay have hauled caravans aroud for 10 years... you never know
