Hmmm.
On the 757 it is the same as the 744, at LOC capture the heading bug swings to the LOC course.
We are however taught that in a strong xwind you should align the bug with your heading when established.
(We fly heading up not trk up).
Thinking behind this is a bit convuluted !......
If you GA the flight director will command track at the time of the GA, however many people will next go HDG SEL. The underlying reason behind that is the 757 keeps all 3 autopilots in during the GA and hence controls rudder as well. As soon as any other mode is selected captured it will drop to one autopilot and no longer control rudder. In an engine out situation it is better to choose yourself when you regain rudder control, rather than the rudder 'dropping out' when the automatics for example go into 'alt cap'.