OEM and LCEngineering (OSVAT) Valves Comparison

I called LC Engineering, and they told me they get their stock sized valves from Toyota. The price was quite good. However, when the package arrived, it was obviously not Toyota parts. They were OSVAT valves. As seen below, the OEM valves had a two angle grind. The OSVAT valves only one. The two angle grind gives better flow characteristics into the cylinder.