A big difference between the UK sports betters and the US punters has to do with the popularity of sports. In the United Kingdom, soccer or football is obviously the most dominant sport, and you will see a lot of special promotions ran by UK marketed sportsbooks directed towards the English Premier League, World Cup and any other soccer competition. Tennis, horse racing and even darts are also a lot bigger in the UK, with almost no market for the likes of darts in the US.
In the United States of America however, the most popular sports are baseball, basketball and football. These are obviously a lot different than the UK sports – for example the traditional soccer game has a set end time, while American sports usually feature the strong possibility of overtime periods, and you can often see American sports extend an hour past their usual end time.