I havent bought much from Temco themselves but just about every other wire out there is made by them. KP wire is ultra clean, it last a longer duration under use, the spooling is top notch (No catching) and above all its Smelted in Sweden and Milled in the USA....Temco doesnt only make wires for vaping, they manufacture lead and other toxic metals...I dont feel as comfortable buying wire that may be made/milled near or on the same machines, or stored with, or may be unprotected against those metals near things I heat and inhale off from, this is why I buy alot of play wire for pictures and self use but I clean the hell out of it!
As long as you clean your wire/coils then you shouldnt have any issues some people like peace of mind when buying their wire.