Considering the style of football Kylian Mbappe and Erling Haaland plays, it's absolutely possible for both players to feature in one team because unlike Erling Haaland, Kylian Mbappe can perfectly play in the positions but Haaland is only good as a top 9 striker. Manchester City without doubt will do anything within their strength to make sure they bring Kylian Mbappe to the club if the chance ever comes but I don't think such thing is going to happen because Real Madrid have reportedly completed over 85% contract deals that'll see the French national team captain join them in the summer. Mbappe also wants to join Real Madrid in the summer and that's why I don't give too much attention to rumours that suggests that Kylian Mbappe might just join another club that's not Real Madrid when he leaves his current club Paris Saint Germaine
Manchester City will be the strongest team if they manage to get Mbappe because the quality that Mbappe has will encourage them to become a team that has goal-hungry front players. However, Manchester City efforts to get Mbappe are certainly not easy because Real Madrid will be at the forefront of getting Mbappe. But everything could change if Mbappe is more interested in playing in the Premier League then Manchester City or Liverpool will be his goal.
Seeing Haaland and Mbappe playing on the same team will definitely be a big surprise that we will see. Especially in this transfer, the decision is definitely in Mbappe hands and where he will join is of course a choice he has planned long ago. We'll see if Real Madrid succeeds in getting Mbappe or they will fail again. Well, the Premier League will be quite good for Mbappe because the Premier League is full of tougher challenges to become champion compared to LaLiga.