Question on dual role players

I have an aml/ml and an mr/amr on my team. I am wondering if they favour one postion or the other. Is the first postion listed their better one?

Some say they do.

But, if you have a dual role player, the roles are always listed in the same order.

You will find a DL/DC but never a DC/DL.

I think I even saw once that a DL/DC on the computer is listed as a DC/DL if you play using your phone. But I've never bothered to check.

every player can play every position and nothing happens

they change from season to season, but sometimes they will perform better in a certain role compared to the other one. They also can be good at both. You just have to try and find out

I think it's very difficult to say because it's depending from the style (formation/orders) of the team and also the opponents.
If you could play with the same opponent, with the same conditions, about 10 times and try e.g. a 4-4-2 or a 4-2-2-2 hexagon, maybe you could have some conclusions.

Roles show differently on mobile and PC - on mobile my left winger is ML/AML and on PC he's AML/ML. AMR/MR is the same on both. They only constant is variability. Its probably down to how they were generated as Nordgens seem to have rules all of their own - but thats a wild guess.

Imo, the order makes no difference to the ability of the player to play either. Which one, if any, a player prefers is dependent on the myriad of unknowns - trial and error.