Hi dano50021,

These servos are basically the same, there may be some very small differences such as the way the lead exits the case, to whether they have ball bearings or how many. As you say you will not see much if any difference in them as far as torque or speed.

As far as the "precision" label this simply means that they have a smaller "dead band" and better resolution.

I hope you find this information helpful. You can also reach our Futaba support technical team at 217-398-8970, or via fax at 217-398-7721.

Sincerely,
Krysta
Lead Futaba Customer Service and Programming Technician