It's really not about the speed of charging for me as both are adequate. It is about the cost of installation and which one is more reliable. For sustained EV charging at 32 amps, you need a high quality, industrial grade outlet which is $75-$100 (Hubbell or others). Most 14-50 outlets are not made for a constant draw like EV charging and residential grade for a washer/dryer. You also need a $45 Tesla 14-50 adapter. Additionally, some people (myself included) would want to purchase another mobile connector ($275) in order to always have the 110v mobile connector in our car at all times. At this point you are already over $400 in costs. The wall connector costs $500, looks better, is safer and less likely to fail (EV charging will melt the 14-50 outlet connectors after a few years, even an industrial grade outlet). The charging faster is just an added benefit. Couple that with a 30% federal tax credit available and the cost to install really is basically the same.