Lets also not forget that the Software suite you are using to produce your Vray image comes in at several thousand dollars, where as the Lux Image will only cost you what...???. $59.95'ish at current 'Reality' pricing.

I'm also surprised that the Lux Image took 4 hours to render.  That is a very simple scene.

But thanks for the comparison..

 

Cheers,

 

S.K.