As for my question regarding "US Army company level firepower", I meant compared to the German of the same level.
Well, now we're getting complicated.
Early in the ETO campaign, US Army Rifle companies operated at or near TO&E strength. That became less and less common as the campaign went on, but quite a bit of effort was made to at least keep units near strength. While there were some TO&E changes, they were fairly minor all things considered.
That wasn't true of German units. They varied widely in strength from the beginning, and several TO&E changes were made. There was also a much wider variety of unit types, with even wider variations in firepower.
Let's take a Grenadier Rifle Company at TO&E strength, however. It has only 142 men against the 193 of the US Rifle Company. It has 15 machineguns against 2 M1919's and 15 BAR's. It beats the US there by any standard I can think of. It lacks the mortar section of the US Company. It has 28 SMGs to 6. Clear win again. No organic AT weapons or RGLs AFAIK, though such things were almost certainly part of the company in practice. So the only real advantages the US company have are more men and three light mortars, against the disadvantage of a lot less auto-weapon firepower.
However, again, let's tree up to the battalion level. A Grenadier Battalion Heavy Company had six 8cm mortars, equivalent to the US battalion mortars... and four 12cm mortars. Ouch. The Germans have nine more of their superb MGs, while the US have eight of the very reliable but very heavy M1917s and six M1919s without crews. In a straight machinegun duel or trench warfare the US might win, but once you start maneuvering, especially on the offensive, those M1917s aren't going to be shooting much. The German Grenadier Battalion has 708 men against 870 in the US battalion.
So the German battalion overall has fewer mortars but more throw weight and a longer reach, 55 MGs against 27 MGs (including .50 cals) and 45 BARs, and 127 SMGs against 20. The US at first glance have more AT firepower with their trio of 57mm guns and their bazookas... but the Germans in reality are probably well provided with Panzerfausts. The German transport situation is mixed. On the one hand, the US battalion has 40 motor vehicles to 13, but the Germans have nearly a hundred horse-drawn carts and wagons, and 34 of the American vehicles are mere jeeps.
I want to make the point again that while you might easily find a US infantry battalion that was within, say, 5% of its authorized strength in every category (especially early in the campaign or shortly after the unit arrived), I wouldn't bet you could find a single German battalion that met those parameters. Even units that had just been 'rebuilt' often had experimental weaponry in place of what the TO&E called for or just were unable to get their full issue of weapons. So despite the grim picture the TO&Es paint, a US rifle company in the field facing a Grenadier company might indeed have superior firepower. The US also had the advantage at the individual level that the Garand was superior to the Kar98, though that may not be very comforting to a GI who realizes that the German battalion his unit is facing has twice as many automatic weapons distributed among only 80% as many men.