What is the difference between the P7513A and P7513?

What is the difference between the P7513A and P7513?

The difference between these two probes is a longer cable on the P7513A.  The added length offered the ability to probe circuits at a greater distance from the oscilloscope.

The P7513 had a cable length of 1 meter and a propagation delay of 4.4 ns +/- 0.1 ns.

The P7513A has a cable length of 1.3 meters and a propagation delay of 5.76 ns +/- 0.1 ns