Alfine 8 vs Alfine 11 Gates CDX chainline?
The obvious place to look is Shimano's specifications page, but that does not appear to give chainline.

A bit of googling found a couple of pages that give specs for the Alfine 8 and 11.

This page simply states the Alfine 11 chainline is 42.7mm.

This page gives a more complete picture for Alfine 8, giving chainline for 2 sprocket mounting positions and several models. Seems that 42.7mm chainline is achievable on SG-C6000 and 6010 models.