We, British and US, sent appx. 6,000 tanks of various types to the USSR. 2,000 Shermans and some M3 Grants (nicknamed coffin for 7 brothers). The USSR made 55,000 T-34/T-34-85 tanks during the war. By comparison the Germans made less that 2,000 Tiger I/II's and appx 6,000 Panthers. The US made appx 49,000 Shermans. The Russians also made a multitude of self propelled guns.
The T-34's, except the T-34-85's, were not equal to the Panthers. Of course the T-34's came out over a year before the Panthers and were unstoppable except by 88 for a while.
The Germans were using long rifled barrels in their tanks, (Tiger, Panther, and MKIV's)think of them as a giant match rifle. The Russian equpiment was mostly smoothbore, think of a giant AK-47. The Germans would try to keep the Russians further back where the could snipe'em. The Russians were forced to get close. If a Russian round hit home it was a powerful hit. The Russians also produced some super heavy tanks JSI-JSIII, 122 mm main gun.
The Russians had the largest air force prior to operation Barbarosa, then they had none. They rebuilt their air force with mostly USSR fighter designs, they did get some P-40's and P-39's fron the US, after we had replaced them with better designs. The USSR didn't develop a strategic air force, but did have a large and by the end of the war eefective tactical air force.
What we gave the Russians was mainly trucks and half tracks. They never had enough. That allowed them to concentrate their efforts on building tanks.
The Russians and Germans were fighting each other with armies that had appx 10,000,000 men each from 1941 until 1944. No the Russians didn't have to invade Normandy but the Germans never made it to Denver either. Nor did the US have entire army groups encircled and decimated.
The German forces in North Africa represented less the 1% of German combat troops. The death of the Africa Corps was as much du to air attacks on German supply ships.
Many of the German divisions in Normandy were made up of captured peoples and Germans that had been considered to old or young to be 1st line soldiers. A few of the "divisions" were shattered remanants of German east front division sent to the west to refit. German divisions had authorized strenghts of appx 12,000. Some of the "divisions", made up of actual 1st rate troops, in France were 2,000 men strong.