Did some tests myself :- )
It's not 100perc (ok, not even 50perc. but it will do)...I dedicated (wasted lol) 30 minutes this late evening to this whole experiment ,and 2x10 minutes from that are render times.
Random notes:
-Does D65 mean different temperature in white balance between Vray and Corona ? Corona is colder, but perhaps I am stupid.
-But outside of this, I did not use any clamping or tonemapping. Both are linear outputs, rendered at final exposure (no tweaks in VFB or PS, so correct MIS is computed in both renderers), with default MIS 20 in both Vray and Corona.
-I use slew of Dubcat's tricks. In Vray, to use flat reflection, I simply uncheck fresnel. In Corona, 999 is not enough, CoronaColor with 9999.. value in HDR is used in FresnelIOR slot.
-But I also use converter, which divides the anisotropy in half. But it still looks different nonetheless. I can't judge honestly, I am not sure what is correct or better.
-What looks like GI/Direct light noise in grey area in Corona render, are reflective (GI) caustics. I unfortunately forgot to turn them ON in Vray. MIS20 still allows a faint of them. My mistake, like I said, 11AM, rushed it...
The lack of GI caustics in Vray perhaps contributes to slightly brighter Corona render....damn, should have thought of that.
Anyway, to keep as much consistency, you can see I only use fallofs to drive mixing, not values, and Siger's ComplexFresnel for metalic speculars, and Siger's ThinFilm for coating.
WELL, but as you can see....nothing drastic right :- ) ? Looks more than close. As we say in mountain biking, choose your renderer (wheel size...) and be d*ck about it :- ).