Not sure the Tesla is a knockoff... the shape is similar but so are a lot of things we buy (light bulbs). And... it appears to be a US company.
I'll be getting three Razors (sweet deal), but would definitely consider the Tesla for the warranty if nothing else. (One year, LED pad replacement three years).
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•Honoring the great Nikola Tesla, these American-made USA CREE™ XLamp® fixtures are produced in the USA. These are not an OEM Asia Product.
Origin:
Tesla: Made in the USA / Austria
Razor: Asia / China
Heat Sink:
Tesla: One piece approx. 2″ thickness
Razor: Two piece approx. .09″ thickness
Size:
Tesla: 23.75″
Razor: 20.5″ and 27″
Wireless Remote Control:
Tesla: Yes
Razor: None
Drivers:
Tesla: Internal / Proprietary
Razor: External / Meanwell
LEDs per pad:
Tesla: 12
Razor: 13
Wattage:
Tesla: 108
Razor: starting at 120
Controller:
Tesla: four channels
Razor: two channels
USA Owners / Distributors:
Tesla: Tesla Motors, Inc. / Sold at OCReef and a few others throughout the USA and Austria
Razor: Coralvue USA / Maxspect China