I'm thinking the same thing about this group, I mean I'm not entirely sure who's going to qualify for the next round yet. Maybe INter Milan are stronger than the 3 clubs here, but that's no guarantee, because I think there will be a lot of surprises in each encounter.
Real Sociedad and Salzburg are not to be underestimated, and Benfica is no exception. I think all the clubs will try to topple each other because in terms of chances I see no significant difference between the clubs and it could come down to goal productivity at the end.
Benfica and Inter look like the favorites in this group, it will not be easy to fight such teams. Perhaps Salzburg or Sociedad will try to surprise us, but it will not be easy. Most likely they will compete with each other for the LE. Sociedad played three out of four La Liga matches in a draw with not the strongest rivals, and it is difficult to evaluate Salzburg by the their championship, they are now in the lead, but we will see how competitive it is from the results of the group stage.