Hi, I have a Harrier 90 with an OS 120AX in it. all up weight 8.2lbs
It is turning an APC 16X6 @ 9100 rpm.This gives 16lbs of thrust at my altitude 850 Ft above sea level,air dencity Hg: 30.06.
I am running the motor on Magnum 20% Heli mix and a Medium rated plug. The motor is awesome hover on less than half throttle and plenty of punch out.
The O.S 160 does have more torque and power but the extra weight of the motor over does the wing loading of the Harrier,so 3D floaty manouveres are no go.

I hope this helps, Regards,Mark