727 - pilot sync (good luck with three engines, some days it was a bear)
S80 - pilot sync unless N1 SYNC switch engaged
A300 - pilot sync
757/767 - pilot sync
737-800 - electrons. Automatic, does an excellent job.
777 - ? Electrons or pilot?
I've always enjoyed the heavy vibration cycle that comes with power reduction for descent. If the pilot allows the N1's to get out of sync it's very noticeable in the mid 60's% N1.