How to create Bayesian data fusion in python with pymc3?

I tried to create the Bayesian inference based on the information that I found in the following links:

I think I created the mu as Generic weakly informative prior and same for sigma (hopefully :sweat_smile:), but when it comes to creating the fusion part, I keep on coming back to the priors as I include the observed data as distribution data from sensors. Am I right to think and assume that difference in the reuslts is due to my setting up the model for Bayesian fusion? Like the parametrization like target_accept, draws, tune and the priors.