Can anyone tell me the major differences between the BA XR and BA SR boot spoilers?

The only difference that I can see is that the SR spoiler is a bit more abbreviated on the sides and has a bit of a detail on the two ends?

Is there anything more?

And for those that know, how much is reasonable to get one of (either) those spoilers painted and fitted.

Cheers,

Different legs where they join to the wing. Essentially the same wing though.