Almost Identiacal Corps one with high loss the other with gain

I Have a question...
I have some corps, all with 250 / 250 Expansion.
selling a product that is always in demand. Welfare less than a point apart, same Tax rates, same Buy / sell strategies and most are making 700+ Mil, except one and it is loosing 450+ Mil per month. How is that possible?

maybe it just bought new supplies or supplies if differing quality? salaries? what corp exactly? it will tell you exactly where your profits and expenditures are coming and going on the corp page

is it producing at the same rate?