About the only differences are the size and how easy they slide. Sadly I think folk that haven't tried a few will be anxious. Give yourself time to find and try a few.
Looks like a capacitive stylus must be used with this phone. I am seeing stylus referred to as 3X and 10X on ebay, with the 10X noted as good for the LG Optimus. Also see some referred to as generic. Any idea which is appropriate for this phone? What happens if you use the wrong one? I'm using a borrowed one now, don't know which kind it is and it works great. Thanks for your input.