Brighton and AS Roma are two middle teams in their league. I think it will be difficult to determine which team to qualify for the next round. Both of them have almost the same level and have similar quality of the squad. I guess the match will be tight because both teams have good players. However, AS Roma has a better experience in international competition like UEL. But I agree there is no guarantee for AS Roma to win against Brighton. Brighton is a team that often surprised us in EPL matches. So, AS Roma must be careful with them.
Brighton scored many goals in any competition this season but their defense looked not strong enough. Sure, AS Roma shouldn't underestimate Brighton because they have great attackers. But AS Roma can feel a bit calm because they seem to have a better defense. We can see from the stats of these teams in their leagues.
If you look at the quality of the two teams, there is no significant difference, so indeed these two teams have the same percentage of being able to qualify for the next round.
If you look at Brighton's performance since the start of the season, they have experienced a slight decline in performance, although not significantly, and this is in contrast to AS Roma, which is improving in quality after changing coaches.
Maybe I see that Roma's superiority is just about mentality on the European stage and maybe that's the only thing that Roma can use to get rid of Brighton.
But whatever it is, it is clear that this is a fight that will be fierce and difficult for both of them.