McLaren is running a very similar wing to the Red Bull 2014 model this weekend in Abu Dhabi.
In the last race before the British team switches to Honda power, it was fitted to Kevin Magnussen's MP4-29 during Friday practice in Abu Dhabi.
The Danish driver said the new wing is a "very different philosophy" for McLaren.
An analysis at Germany's Auto Motor und Sport said: "The (Red Bull) concept has been completely copied.
"Compared to the old McLaren front wing, the new version has virtually nothing in common."
Developing for 2015
Team boss Eric Boullier confirmed: "Most of the first session was dedicated to a number of solutions aimed towards 2015.
"They are associated with a new concept of aerodynamics, which will be embodied in the car next year," he is quoted by f1news.ru.
The Frenchman admitted that the 'new concept' is essentially down to the arrival at Woking of Peter Prodromou, Red Bull's former aerodynamics chief.
"So now we are trying to check the conceptual decisions underlying the 2015 car and this work will continue in the tests next week," Boullier added.