Liverpool winning Brighton isn't really much of a big deal to me, i don't think anyone should take them seriously at this point because it is a little too late to think of start levelling up. United on the other hand are not in a very good form at the moment so betting on them to win is very risky, both it is sure that they will definitely score and also concede, so it's safe to bet on a btts option or over 2.5 goals
Liverpool are defending champions but they didn't take the new season seriously and that's the reason they are now taken not serious by any team. After 16 games, Liverpool won just 8 while in 6 games the club faced defeat. With such stats it's very difficult for a team to make a comeback and defend his title. Right now Arsenal, Manchester City and Aston Villa are competing for the number one position and it's difficult to say which team will win the title because still too many games left to be played.