JPB,
No SmartWax is not from AutoGlym. EGP has been known to be one of the leaders when it comes to long lasting though it looses out when it comes to shine. To get the best from EGP you need to leave it on for at least 2 hours from my experience to bond with your paint.
SmartWax can be applied and wiped off immediately even if your car is still wet. The wipe on/wipe off is REALLY easy and there seems to be more shine. In terms of durability, well I am still waiting to see how long it will last since I have just put it on but was told by other Autoglym fans that it equals EGP. Will keep you posted on my own experience.