I've got a couple with the thong and couple with the strap. Six of one and half a dozen of the other when it comes to choosing. Neither are thumbbreak speed draws and both keep the gun secure.
I have been annoyed by the strap's extra length, snagging on tree branches or my hand hitting it as I walk. No big deal though. Really just a matter of preference and looks.
EPS sure makes an awesome holster though. My first one is 21 years old now and still working perfectly. I think my daughter and her kids could use it for a few more generations....