I have two providers for a process e.g.
steel production, converter, unalloyed | steel, unalloyed | EN15804, U and
steel production, converter, unalloyed | steel, unalloyed | Cutoff, S
The first one is from the new EN15804 add on and the second one is from the Ecoinvent 3.9.1
All the general information are exaclty the same and both of them are Systems even though the first one has the U characterization.
What is the actual difference?