The revised RC F is certified for Euro 6d, the old one along with the GS F is Euro 6 compliant.
From the press release:
To comply with the new Euro 6d emissions requirements, the RC F’s exhaust system has been fitted with a new Gasoline Particulate Filter. This has brought about a change in the car’s power and torque output figures: maximum power is now 457bhp/341kW at 7,100rpm, with maximum torque of 520Nm delivered at 4,800rpm.The RC F also adopts the new Drive Start Control system featured on the 2018 Lexus RC