Possessor of a GARMIN EDGE 1030 and newly a Forerunner 945, I also noticed that the training loads between these two devices did not synchronize. The scores and statuses are different from one device to another.
I made several bike trips with my EDGE 1030 and then I made the synchronizations between my two devices. Each time the scores and status did not coincide. So I tried to do the synchronizations by removing Physio True Up on both devices. I got two different results which makes sense. I then put the physio true up function back. there was a change of score for the Forerunner 945, but that is not the same as on the EDGE 1030. I noticed that the Forerunner 945 did not fully take into account the cycling activities which does not allow not actually have the same scores and status on each device. Maybe a future update on the Forerunner 945 will solve this problem.
