Arsenal is a much stronger team than Manchester united. However we have not seen a better performance from Arsenal in the last two matches. Arsenal lost against West Ham and drew 0-0 against Nottinghamfforest. Arsenal is a strong team but is a bit off form now. On the other hand, Manchester united's performance is very erratic. Manchester United is more likely to lose points against Arsenal. However, I would say that Manchester united will try to share points in this match . So if manchester united's defenders play well, Manchester United has a slim chance of getting 1 point in this match.
Talking about the Premier League there is actually no team that is really stable except Liverpool, we can see in the standings that all teams have a record of defeats and draws in the last 5 matches so if both teams fight each other then each has a chance of winning and losing just like the upcoming match between Manchester United vs Arsenal of course Manchester United has a chance to win because previously they had beaten Manchester City last December or last January the two teams drew, that's why we don't need to be too confident in one team except Liverpool because Liverpool are ambitious to secure the title this season and they are on the right track.