Both are fantastic! The Wilesco has more features, electric heating and is bigger in size and weight (7.5kg) What i also like on the Wilesco is the smoking chimny and the big oil/water collecter in a tray in the base. It also has a rev. counter and water pump with basin in the base. The Maerklin on the other hand is more solid looks more classy, the materials used feel and probably are of higher quality, it is a compound which is unique, it takes a longer time to steam it up. (due to its mass and my rather small ceramic gas burner) I would have a hard time to choose a favourite, as i said before both are great to run and to watch. By the way Wilesco will bring you a limited run of 500piece of the D32 beginning of 2018!