'Better' is indeed subjective and depends on what the modeller or customer wants from the model, or indeed from the process of building it.
Display models can be quite simple affairs, while RC models can be exquisitely detailed. Some modellers want a model that looks good from a distance and so wil not be bothered with such things as railings or small details, while other modellers go to a supreme degree of detailing, to the point of finding out what certain details do so they can make them even more accuratley.
My question to you is what are you trying to achieve? Are you looking to buy or build, and if so are you looking for an answer to help make some decisions?
A stationary display model can be as expensive as an RC one, or both can be really cheap to build. Every modeller will have their own methods, budget, styles and opinions as in all walks of life