While I haven't had this service done, I do know a lot about various styli shapes.
The HE, (hyper elliptical) will follow the cutting stylus closer to the actual cut than a standard elliptical stylus. You will need to be more careful on set up, but the HE will sound better.
http://www.ortofon.com/images/stories/stylus/Everything%20you%20need%20to%20know%20about%20cartridges_Stylus%20type.pdf
The HE, (hyper elliptical) will follow the cutting stylus closer to the actual cut than a standard elliptical stylus. You will need to be more careful on set up, but the HE will sound better.
http://www.ortofon.com/images/stories/stylus/Everything%20you%20need%20to%20know%20about%20cartridges_Stylus%20type.pdf