here is no question that the former German territories were more developed and thus more valuable than the former Polish territories in the East.
That is rather a moot point, more or less developed it depends on a point of view, we are not talking Kuwait here.
No, because Stalin wanted those territories,
EXACLLY. STALIN was the decision maker here neither Germany or Poland had say in this.
Hence your claim that those land had been a compensation from Germany to Poland for all, or for anything is an utter nonsense and it doesn't reflect reality. It must be some kind of the German urban myth.
A convenient excuse in my eyes.
but the many treaties between Poland and Germany afterwards do.
Well, the point is there was no treaty that would nullify legality of the Polish claims for compensation they have never received. All you have is some Soviet scrap of paper from Moscow. It doesn't really cut it.
So there is only one trick - German pony trick, that pay to all and sundry but Poland.
That is telling.
t is undisputable that the German territory lost in 1945 was overwhelming German in character
Who cares about German character. Germany never bothered about Polish character of the land they grabbed.
The difference here lies in the fact that Poland has undisputable historical claims to those territories, including centuries long rule, oft longer than German rule and if we exclude Prussian rule from the equation, German rule doesn't even came close.