American WW2 Tanks by Image

not necessarily, the project initially went under the T28 designation in 1944 as a superheavy, later switching to the T95 GMC designation as a part of modernization efforts in 1945, finally returning to the T28 superheavy during the late stages of it's project in 1946 up until the projects end in 1947.

the 2 track options come from the fact it was an option to reduce ground pressure, letting the tank be carried more efficiently and easily in more transport systems.

Both under the T28 and T95 designation the project went through many stages with different features being tested but the base was the same under both designations, only difference was many changes in the way the US army designated tanks at the time.