So are the main differences between the Sterling and the Stingray the body shape and the switching on the pickup?
It's a completely different beast, though a humbucking beast. The most important difference for me between the two was probably the neck. Neck profiles are very different between the two. If you like the feel of a jazz neck, the Sterling neck will be better for you. I owned a StingRay for about 30 minutes but took it back after realizing I was not going to bond with that neck, ever, as long as that Sterling was in my arsenal.