Resolve 15b5, Nuke 10.0v3, Mac Os X Sierra
Nuke and Resolve match for me. I don’t have RV, so can’t test that, but when I bring a ProRes render from Resolve back into Nuke it matches the original EXR + the Rec.709 ODT.
Have you tried bringing the ProRes back into Nuke? Set the Read node colorspace to “Output - Rec.709” so that with “Rec.709 (ACES)” as the VLUT it’s essentially a passthrough.
How are you generating your JPEGs?