In ranked mode you have a battle ranking that goes up and down depending on your wins and losses, and you're matched with other players of similar ranking. (gamesradar.com)
Most tournaments require players to be in the same or similar rank as their teammates. (coin-drop.com)
If the cards are of similar rank then the pot is split but the suit itself is never used to determine the winner. (thatvideogameblog.com)