There are very important differences in the computational cost of the methods used. MARS took always less than 3 minutes, the backpropagation simulations took about 5 hours and the Bayesian Markov Chain Monte Carlo simulations took about 20 hours.
If the computational costs are a determining factor in the application studied these differences must be taken into account. MARS gives good estimations at a minimum cost. We believe that MCMC simulations need an important time optimization.