How the parameters are estimated it not the message. In statistics there are latin letters and greek letters. When you see a symbol denoted as a greek letter t

How the parameters are estimated it not the message. In statistics there are latin letters and greek letters. When you see a symbol denoted as a greek letter then that is a population parameter. When you see a latin letter that is a sample estimate. It could be Frequentist, Bayesian, Likelihoodist, Fiducial, Empirical Bayes, etc. Theoretical population greeks or sample calculated latins.