What's NVENC H264 CQP for X264 CFR 18 and 23?

[Flagship]

What's the general guideline to get the same quality between X264 and NVENC H264?

[LigH.de]

A constant rate factor works like a slightly variable, scene content adaptive quantizer. So there cannot be an equal formula.

[Flagship]

A constant rate factor works like a slightly variable, scene content adaptive quantizer. So there cannot be an equal formula.

Not exactly but appoximately. Same visual quality or whatver it's called