That's right.
To my knowledge, none of the Ta 183 prototypes actually took to the air, until by the Soviets well after war's end.
It was only then that the design flaws of the airframe were discovered and rectified (lowering of the tailplanes, wing fences added, etc.), and the VK-1 engine of the Mig-15 was little more than a "Russianized" British Rolls-Royce.