Comparison of posteriors obtained from a standard Gaussian likelihood analysis when using different MCMC samplers for the same noiseless mock data vector. In pink and in grey, we show the posteriors sampled with nautilus (Lange 2023) from a likelihood defined by a sample covariance based on mocks from the anisotropic systematics model and the standard isotropic systematics, respectively. In green and orange, we show posteriors sampled from the same two likelihoods as before, but sampling with the multinest sampler (Feroz et al. 2009) instead. All inference shown is done using the real KiDS data vector.