the Sherman had a bigger profile weaker gun and thinner armor with less slope. it does not compare to the other light tanks currently in the game.
Wrong, wrong and wrong.
Dimensions:
PzkwIV(H): Length : 8.15 meters / Height : 2.68 meters / Width : 3.33 meters
T-34/76 (Model 1942): Length : 6.75 meters / Height : 2.45 meters / Width : 3 meters
Sherman: Length : 5.84 meters / Height : 2.74 meters / Width : 2.62 meters
So the Sherman is shorter and narrower, only marginally taller than the IV, and less than .3 meters (about a foot) taller than the T-34. So it isn't so much "bigger" that it is at any disadvantage vs. the other two. (Center of gravity, perhaps another issue, but irrelevant to the point).
Armor:
PzkwIV(H):
Hull Front (Upper) : 80mm @ 80°
Hull Front (Lower) : 80mm @ 76°
Hull Sides (Upper) : 30mm @ 90°
Hull Sides (Lower) : 30mm @ 90°
Hull Rear : 20mm @ 82°
Hull Top : 12mm @ 0° - 5°
Hull Bottom : 10mm @ 0°
Turret Front : 50mm @ 80°
Turret Mantlet : 50mm @ 60° - 90°
Turret Sides : 30mm @ 64°
Turret Rear : 30mm @ 75°
Turret Top : 15mm @ 0° - 7°
T-34/76:
Hull Front (Upper) : 45mm @ 30°
Hull Front (Lower) : 45mm @ 30°
Hull Sides (Upper) : 45mm @ 50°
Hull Sides (Lower) : 45mm @ 90°
Hull Rear : 45mm @ 45°
Hull Top : 20mm @ 0°
Hull Bottom : 20mm @ 0°
Turret Front : 70mm @ 60° & Round
Turret Mantlet : 40mm @ 30° & 90°
Turret Sides : 52mm @ 70°
Turret Rear : 52mm @ 70°
Turret Top : 20mm @ 0°
Sherman - Standard M4 (i.e. 1942 version to compare to the T-34)
Hull Front (Upper) : 51mm @ 34°
Hull Front (Lower) : 51mm @ 34° - 90°
Hull Sides (Upper) : 38mm @ 90°
Hull Sides (Lower) : 38mm @ 90°
Hull Rear : 38mm @ 80° - 90°
Hull Top : 13mm @ 0° - 7°
Hull Bottom : 19mm - 25mm @ 0°
Turret Front : 76mm @ 60°
Turret Mantlet : 89mm @ 90°
Turret Sides : 51mm @ 85°
Turret Rear : 51mm @ 90°
Turret Top : 25mm @ 0°
Sherman M4A3(76)w (i.e. the March 1944 version I suggested a comparison against initially).
Hull Front (Upper) : 64mm @ 43°
Hull Front (Lower) : 51mm - 108mm @ 34° - 90°
Hull Sides (Upper) : 38mm @ 90°
Hull Sides (Lower) : 38mm @ 90°
Hull Rear : 38mm @ 68° - 80°
Hull Top : 19mm @ 0° - 7°
Hull Bottom : 13mm - 25mm @ 0°
Turret Front : 64mm @ 45° - 50°
Turret Mantlet : 89mm @ 90°
Turret Sides : 64mm @ 77° - 90°
Turret Rear : 64mm @ 90°
Turret Top : 25mm @ 0°
The PzkwIV's front hull armor is thicker, but had virtually NO slope at all. The Sherman's is actually THICKER than the T-34's, and has a 34 degree slope vs. the T-34's 30 degree. The turret front and mantlet even on the 1942 version of the Sherman are thicker than either the T-34 or the IV. The T-34 has an advantage to sides and rear on the hull, but the turret is the same, and the Sherman has a clear advantage over the IV in these areas.
Heck, why do you think people complain about the Firefly's armor? It is no more armored than any other Sherman would be. It is simply better than most give it credit for -- because they "know" the reputation, and not the data.
As for the gun: The T-34's 76mm gun was quite a poor performer given its size, as were many Soviet guns. The 75mm M3/L40 gun on the Sherman was the equal of the Soviet 76.2mm F-34 / L42 using standard AP rounds. This is why both the Soviets and the US started upgrading their armament when the Germans started deploying heavier tanks in numbers. The Soviets upgraded to the 85mm gun, and the US to the 76mm gun, which again were very comparable in hitting power
(very quick reference), and outperformed the KwK 40 on the PzkwIV(H).
So a "standard" Sherman will either have the punch of the game's T-34/76 or T-34/85 depending on whether it is a 75mm version or a 76mm version, and have armor comparable to both the T-34 and the IV. In other words, it will be
quite competitive against the current set of non-perked tanks, even without the massive firepower of the Firefly. To say anything different is to simply ignore the data in favor of popular myth.
(All referenced data taken from this site.)