The difference between multi-millionaire 4 and millionaire 14+1. 

multi-millionaire 4: 

Predict the scores of all 4 matches(home & away), select one or more scores for each team, multiple scores will increase the entry amount and total bet price.
Settlements are based on the result at the end of regular time. This includes any added stoppage time but does not include extra time and a penalty shoot-out.
You will share the football jackpot when your predictions for all 8 teams are correct.
Winnings will be paid out shortly after the last match and all results have been confirmed.
Predictions and all entries are open until the kick-off time of the first match.

millionaire 14+1:

Select 14 matches (home win, draw, away win) and 1 bonus match to online betting.
Settlements are based on the result at the end of regular time. Includes any added stoppage time, but does not include extra time and a penalty shoot-out.
Winnings will be paid out shortly after the last match and all football results have been confirmed.
When Match is postponed/abandoned, we reserve the right to wait for 24hrs. If the match doesn’t resume within 24 hours, the results will be considered a draw. When 3 or more matches are canceled, the bet will be canceled and your money refunded.