I wouldn't want Samsung to just “deny", they need to clarify exactly what you will get, if you buy. As things are, if I was in the market for a large, high-end TV, I would not be buying a Samsung OLED.
Very sneaky and there should be legislation requiring certain disclosures. The panel type is a fundamental spec that needs to be disclosed. A spec sheet is otherwise completely useless.
They know if they price the S90C at the same level as an LGC3 with the same panel nobody would touch the Samsung given the lack of Dolby Vision and inferior upscaling and picture accuracy. The only reason you would consider it would be with the better hardware the QD-OLED panel offers.