light is the key to these specific photos IMO
The units are bathed in non directional natural light which gives any sensor much room to play with. The more light, the less chance for noise. Secondary is a great piece of glass. Which can be found on higher end cell phones and all the way up to car priced lenses on pro gear. There are other good points about tripod, reflectors etc. But I would say the icing on the cake would be a good processing program, IE Lightroom or the like. It helps you pull all detail, balance light where it needs it, and adjusts color temp to exactly what you want it to look like.
All of the above takes some effort and experience to Net a good result.