The T1E1(90) is pretty much a normal T1E1 except with a 90 millimeter cannon strapped to it. It is armed with the aforementioned T7 90 mm cannon, along with a M3 37 mm auxiliary cannon. It is a heavy tank at Rank III and has 2 hull-mounted M2HB 12.7 mm machine guns, as well as one roof mounted one. It has extremely light armor, but decent survivability due to large spacing in the vehicle. 

The M44 is a Tank Destroyer introduced in Update 2.43, "Storm Warning", and resides in many tech trees. This vehicle currently sits in Rank III. The M44's 155mm cannon is feared by many due to its higher-than-average HE velocity and quick traverse, although it is also just as vulnerable due to its open-top design.