For fans of the beautiful game, few leagues are as grand and revered as the Premier League and the Champions League. However, their differences lie beyond just being prestigious competitions in the football world; these two tournaments' essence, structure, and level of competition are distinct.

Origins and Governing Bodies:

The Premier League, inaugurated in 1992, is the top tier of English football and is governed by the Football Association (FA). It has 20 teams, comprising the crests of 's footballing heritage. 

In contrast, the Champions League, rebranded in 1992 from the European Champion Clubs' Cup, is a continent-wide competition conducted by the Union of European Football Associations ().

Competition Format:

The Premier League runs on a double round-robin format, with each team playing the other twice (once at home and once away) in a season that typically runs from August to May. The 2023/24 season starts on Friday, August 11, with Burnley hosting EPL champions Manchester City. 

Points are awarded per match: 3 for a win, 1 for a draw, and none for a loss. At the end of the season, the team with the most points lifts the coveted trophy. The bottom three teams face relegation to the lower-tier .

On the other hand, the Champions League begins with a qualification process based on teams' league rankings from the previous season in their respective domestic leagues. A maximum of four teams from the Premier League can qualify directly for the group stage of the UEFA Champions League.

A process follows where officials draw 32 teams into eight groups of four. The top two from each group then progress to the knockout stage, culminating in a single-match final held at a neutral venue.

Competing Teams:

The Premier League is limited to English clubs. However, the Champions League involves the top clubs from all UEFA member countries. Typically, the top four teams from the Premier League qualify for the Champions League, providing a dynamic link between these two competitions.

Scope, Prestige, and Most Successful Teams:

The Premier League, known for its competitiveness and unpredictable nature, holds enormous prestige, mainly because of its global audience and high-quality football. It boasts some of the wealthiest football clubs and attracts top-tier talent worldwide. 

Manchester United leads the Premier League titles tally, having clinched the trophy an impressive 13 times, with Manchester City, Arsenal, and Chelsea amongst other multiple-time winners.

However, many often regard the Champions League as the pinnacle of club football because of its international scope. It allows the top teams from different nations to compete against each other. 

Winning the Champions League is a hallmark of success in European football. The club with the most Champions League titles is Real Madrid of , with 14 titles. 's AC Milan of Italy follows them with seven wins, and Liverpool and Bayern Munich have both lifted the trophy 6 times each.

Viewership:

The Premier League enjoys an extensive global viewership. During the 2023/24 season, the Premier League reached a cumulative global audience of 3.1 million per game. Lucrative TV rights deals facilitate this wide-ranging viewership and popularity, enabling the broadcasting of games worldwide.

The UEFA Champions League, too, commands impressive viewership numbers. The 2022/23 final alone, played between Guardiola's Manchester City and Inter Milan, drew a global audience of around 450 million. Over the course of the whole tournament, the cumulative viewership runs into billions as it's broadcasted in over 200 territories around the world.

Financial Aspects:

Both tournaments offer substantial financial rewards. However, their distributions are different. In the Premier League, clubs receive a share of broadcast rights, with bonus payments for televised matches and a final position payout. The Champions League payout depends on participation, performance, and the ‘market pool' (broadcast revenue from the participating clubs' countries).

Key differences summary between the two leagues:

DifferencesPremier LeagueChampions League
Governing BodyThe Football Association (FA)Union of European Football Associations (UEFA)
Inception Year1992Rebranded in 1992 (Originally European Champion Clubs' Cup)
Structure20 teams, Double Round-robin, Home and Away MatchesQualification, Group Stage, Knockout Rounds, Final
EligibilityEnglish Clubs OnlyTop Clubs from all UEFA Member Countries
Most Titles (as of 2021)Manchester United (13 Titles)Real Madrid (14 Titles)
PrestigeHigh (Mainly due to competitiveness and global audience)Highest (Due to international scope and top teams from different nations)
Financial RewardsShare of broadcast rights, bonus payments for televised matches and a final position payoutDepends on participation, performance, and ‘market pool' (broadcast revenue from the participating clubs' countries)