What he probably means is the second has a better feel to it, that is in all the details and the overall visual simplicity making for a marketing or even museum quality image - the soft shadow breaking the composition, the subtle gradients over the planes and in the background. This is what only a few companies get right. Plus, well, the first one is just amateurish. There are lots of good product rendering enthusiasts but only a few professionals get that communicative value to be optimal.