They are smarter, faster, more experienced and sober
War is not ballet.
You could be Christiano Ronaldo, but the artillery shell does not know that.
Also, on what planet is Spain "experienced"? The last time they fought a big war, it was their own civil war in the 1930s.
The US and Chinese both say that the two most experienced (in modern warfare) armies in the world are Ukraine and Russia. It's why everyone and their mother are sending specialist observers.
But even if you academically absorb all the lessons of this war... you won't have the several hundred thousand battle tested troops that Ukraine and Russia will have for the next 20-30 years.
Experience is experience, and you don't have it until you have it.