Aum and auq run a forged crankshaft, yes agu has slightly stronger standard rods compared to aum. Which is all pointless given that they all will more or less handle 300 ft-lb of torque for arguement sake, but if you wanted more on either engine you would ideally upgrade the rods anyway...
The cable throttle is a benefit but so too is the me7 ecu fitted on later cars when it comes to mapping.
Bam also has forged crankshaft but the piston is different from agu or aum or auq for that matter, bam pistons are lower in compression although it retains the same stroke and bore size.
As I had said before, whenever I do an engine conversion I always source the same type of throttle engine as what the car had originally. So if a car came with drive by wire, then fit an aum, auq, bam, if it came with drive by cable then stick to an agu, I would not bother changing between the two and chances are most people would not be willing to pay me extra to change between it anyway...