I think Roma are quite likely to be eliminated from the Europa League quite early. Because Brighton are a really challenging opponent for them. You know how good Brighton were in the group stage as well. They have a squad including quite talented players. I must admit the drop in their form in the Premier League recently but they are still a big threat to Roma.
Brighton is not overly better than Roma. I agree that Brighton is slightly in better form but that doesn't mean Roma doesn't have a chance. Roma have been better under the management of De Rossi.
Brighton also concede a lot of goals like Roma so Brighton don't have too much of an advantage there.
The way I see it, both teams have a very big chance of qualifying. I might go against popular picks and take Roma to win.
I will say this, Brighton is in harder competition in the English Premier League compared to Roma in the Italian league.
How did you conclude that the premier league is more difficult than the Serie A? Have you been following Serie A in recent years? Do you see how competitive it has become? In fact, to me, Serie A is the most competitive league among the top 5 leagues. This misconception that the premier league is harder than every other league should stop.