Fire, I believe the main difference is the Accubond was developed with a sleeker more aerodynamic shape with the plastic tip hence the 'Accu' portion of the name. It's supposed to have the potential for better then normal accuracy and still deliver with the killing penetration. As we all know however accuracy is up to what the gun likes so some will still get better accuracy with Partitions, but many do see good to great accuracy with Accubonds. Partitions from my research while always know for great penetration weren't always known for exceptional accuracy, good hunting accuracy, but not wiz bang minute of angle long range accuracy (I know, I know, some guys have gotten ultra great accuracy with them however). I do think if a reloader were to experiment with enough components i.e. powders, primers, brass, lands depth, they'd probably find a recipe that worked with the Accubonds in terms of high accuracy.