  We consider a family of $\mathcal{N}=2$ superconformal field theories in four
dimensions, defined as $\mathbb{Z}_q$ orbifolds of $\mathcal{N}=4$ Super
Yang-Mills theory. We compute the chiral/anti-chiral correlation functions at a
perturbative level, using both the matrix model approach arising from
supersymmetric localisation on the four-sphere and explicit field theory
calculations on the flat space using the $\mathcal{N}=1$ superspace formalism.
We implement a highly efficient algorithm to produce a large number of results
for finite values of $N$, exploiting the symmetries of the quiver to reduce the
complexity of the mixing between the operators. Finally the interplay with the
field theory calculations allows to isolate special observables which deviate
from $\mathcal{N}=4$ only at high orders in perturbation theory.
