Shadows are (as I would have expected) much deeper on the reference image, so an overall turning down of the exposure value will both reduce the exposure on highlights and deepen the shadows. Materials in your reference image are much darker, in your image they appear to be pure white, so I'd also adjust the material to be much more toward a mid-grey. As well as adding a texture for the material, as that adds more visual interest and probably further darkens the material on the walls with darker areas and lines.
Also, enabling the ACES OT tone mapping if it is not enabled, and applying a LUT, could yield some interesting effects to the overall look :)