Very nice presentation of Tamiya's old war horse. Modelers considering the Tamiya kit should be advised that it has the engine deck of a gasoline-powered M3, but the upper tail plate of a diesel M3A5 (curiously, Tamiya's Grant has the correct rear arrangement). It also has some dimensional problems common to kits from the early 1970's, and the kit tracks had end connectors that were centered on the track blocks instead of being in between them, so they didn't connect anything. This made the vinyl more flexible, but it is annoying today.
Academy's M3 Lee kit is more accurate overall, though the exhaust arrangement depicts a very early production model. The first release of the kit had incorrect, overly tall suspension bogies, but Academy went back and corrected those parts, so current kits are correct. However, the lowered suspension means that the tracks are now too loose, so aftermarket tracks might be a good investment.