Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.19
Broken: version: 2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: rB211b6c29f771
Short description of error
There seems to be a differing amount of noise when rendering the world background between 2.82 and 2.83 in Cycles. I can't work out whether this noise is actually increased or if it's just different. In any case, it appears that the noise in 2.82 is more uniform and 'correct'. Tweaking the levels for better viewing (see the attached gifs) makes it appear as though in 2.82 the noise was perhaps more spread out and there were both lighter pixels and darker pixels, whereas in 2.83 the noise appears closer together and there are far fewer lighter pixels, seemingly making it more noticeable. Is this intended behaviour?
Exact steps for others to reproduce the error
Both gifs are of default cube renders in each version using identical settings @ 512 samples.