The Fairground subtheme is part of the LEGO Creator Expert theme and represents a number of sets that incorporate elemets of fairs and amusements rides including roller costers, carousels, ferris wheels and more.
The LEGO Creator Expert Modular Buildings subtheme is an extension of the Advanced Models theme. Modular Buildings features large, detailed, connectable buildings, aimed at adults and teenagers.
LEGO Creator Expert is a theme associated with the Creator theme but is focused on more advanced models and is the succeeding theme of LEGO Creator Advanced Models.