This is a scale engine. Lionel is using the same molds for their scale USRA Mikados.
They also did a semi scale Mike with and without TMCC. A quick identifier is the scale engine has pair of 4 wheel tender trucks and the semi scale version has 6 wheel tender trucks.
The TMCC engines are easily upgraded to cruise with an ERR Cruise M. They have puffer smoke with 2 chuffs pre rev as does most K-Line steam. Can be upgraded as well at extra cost.
Pete