"Stronger than ever" hardly qualifies.
At the similar numbers, German troops could`ve hold the Soviet front almost indefinitely in WW1, but collapsed in a space of less than 2 years in ww2.
And I see that you need to read up on the First World War and stop thinking that all of these British "tragedy of the trenches" dramas are historical fact; because that it just one tired myth that needs to die, along with the adjoining myth that tanks+aircraft reversed the equation and made the offensive the norm in the Second World War.
The Germans were never on the defensive in the Eastern Front during the First World War. In fact the First world War was never a defensive war with the exception of the Western and Italian Fronts from 1915-1917.
People keep forgetting that Germany conquered most of Belgium and reached the Marne in 1914, and almost reached Paris again in 1918. This is not an army on the defensive. Heck, if you knew anything about German tactical practice you'd know that even at the tactical level they relied on highly offensive tactics even when "defending" - their favored method being to leave a very thin line of initial defenses for the British/French to capture; which they crush with a massive counter-attack.
Meanwhile, in the East, you had utterly massive battles of maneuver and encirclement. Tannenberg keeps getting mentioned, but that's a pittance compared to something like the "dance" around Przemyśl - which were enormous battles of encirclement that the Brits and French don't like to mention because it shows people can in fact engage in a war of maneuver despite the supposed paralyzing power of trenches and machineguns.
Really, the only reason why the trenches and defense narrative persists is because of the British and French overdramatizing it as representative of the war (really, name the last First World War movie that actually featured Russians instead of Brits and French in the trenches); in large part to cover up their offensive plans were based on a lot of incompetent wishful thinking.
This is after all a French Army that believed "elan" made them bulletproof and a British Army whose commander believed he was ordained by God and yet couldn't bother to check if the 1 million shrapnel shells his army fired actually cut the barbed wire.
In short, the First World War actually taught the Germans that offense paid off. Which was disastrous when they started facing competent enemies who didn't simply break at the first hammer blow.
but look at the other side of things, how Both Germans and Soviets
could often break through the defenses in a meter of hours.
And if you were aware of real frontage issues you'd realize that in such fast successes the Soviets would pile as many as 5 Divisions for a 15km front, against which there would be only 1 German Division covering the same frontage, conferring a 5-to-1 advantage for the attacking side. If they didn't break through quickly, then the attacking side is about as incompetent as the Brits and French were in the First world War.
Meanwhile, the US National Guard battalion at Mortain faced an entire SS Panzer Division. Explain to me then - if the offensive was so powerful - why did just one battalion stop cold a whole Division?
Because really, the old 3-to-1 attack ratio still applied in the Second World War; and if anything it became even more of a necessity.
Now consider that in Battle of Kursk...
I have considered it, and unlike you I actually looked at the real battle instead of the fantasy version where the Germans "won" because of doctored casualty figures that keep getting cited by dishonest Internet myth-making sites.
Really, if the Soviets lost so much more than the Germans, why is it that the Soviets were able to immediately launched a counter-offensive and not the Germans? Why did the Germans lose ground - including pretty much all of the land they held after the "back hand blow" counteroffensive?
Even more importantly, a close reading of the battle would show that wherever the Germans encountered heavy defenses - mines, AT guns, and entrenchments - they were in fact stopped cold. The only time they really inflicted heavy losses on the Soviets was Prokorovka (which dishonest German-biased Internet "references" have attempted to conflate as representative of the entire battle) - where the SS Panzer Corps was on the defensive and trying to contain a massed tank charge. There is a reason why the Germans believed in "move offensively, fight defensively" - because even while they were addicted to offensives on the strategic level they realized it was still better to be on the defensive tactically.
Indeed, the numbers of Kursk are deceptive because the Soviets didn't need more men just to "defend" against the Wermacht. Instead, all the extra troops were there to make sure the Soviets could immediately go on the counter-offensive after the Germans had shot their bolt; and again the counter-offensive was hugely successful and pretty much drove the Germans out of all the territory they gained in Third Kharkov. This is again why shallow analysis that only looks at troop numbers and kill ratios is so deceptive and pointless. More often than not it's just cherry-picking - like claiming that a boxer won the match because landed a solid right hook when in reality that same boxer landed on the mat three seperate times and was actually TKO'd.
Nonetheless, none of this matters anyway since we're originally talking about France 1940, where again you're throwing out big words without knowing the reality is this simple:
Option 1: France keeps its forces along the Dyle, which thanks to the shorter line length means they get to keep 7th Army in reserve
Option 2: France advances to Breda, the extra length of line requiring the immediate use of 7th Army leaving France with no reserves.
That's the frontage issue. Shorter line and have a reserve, or longer line with no reserve. Pretending that overextending their defensive lines wasn't a big deal in a vain attempt to save Belgian and Dutch Divisions - none of whom by the way proved useful in containing the Sedan breakthrough - simply flies in the face of the facts.
When you lengthen your line, troops have to man that line. If your line is too long - more than your troops can hold - the result is that there are holes or weakspots in your line. Sedan was one such weakspot created precisely because the line was over-extended. All you're really doing is to find
excuses for a blatant violation of this simple, unalterable "ruthless math" of war; which no amount of semantic gymnastics will alter no matter how many big words you use to try and pretend 1+1 = 3.