1. Definition, the English League One (England's first division) and the English Premier League (England's super league) are both part of the English league, the difference is that the English Premier League is the top league, while the English League One is the third tier.

2. The number of teams and the level of competition. The English Premier League has 20 teams competing in the competition, most of which are England's biggest clubs, such as Manchester United, Chelsea, Liverpool, etc. In contrast, the English League One has 24 teams. In contrast, the English League One has 24 teams competing, with a relatively low level of competition and a smaller team size than the Premier League.