Raymarine (and their predecessor AutoHelm) pilots will steer by
apparent wind,

Yes, the 3 pilots that I'm currently evaluating all steer to apparent
wind. In this, they all function similar to simply sailing to a given
magnetic heading. Instead of selecting your magnetic heading, they
simply allow you to sail to a specified degree of wind off the bow.

The Simrad, however, allows one more layer above the steer to wind
mode - in that it also keeps track of the windward waypoint.

Anyone with specific experience with this feature???

Keith