After being reminded of the head-to-head tiebreaking implications of tomorrow's match, I got interested in what would decide the home field advantage for FCD v. SSFC after we win tomorrow.  Turns out it is Goal Differential, so as long as we win, it doesn't matter how we win besides the obvious advantage of helping our GD and hurting theirs.  If we lose or tie though, total GD becomes irrelevant.

For easy reference, I've posted the whole tiebreaking procedure from the league's website:

TEAM-STANDINGS TIE-BREAKING PROCEDURES

The team awarded the highest position in the MLS standings will be the team with the greatest number of points (3 points for a win, 1 point for a tie, 0 points for a loss). In the event that two teams finish the regular season with an equal number of points, the following system will be used to break the tie:

1) The highest position shall be awarded to the team with the better win/loss record in current regular season games against all other teams equal in points. (head-to-head competition)

2) If the teams are still equal in the standings, the highest position shall be awarded to the team with the greater goal difference against all other teams during the regular season. (goal differential)

3) If the teams are still equal in the standings, the highest position shall be awarded to the team scoring the greatest number of total goals against all other teams during the regular season. (total goals)

4) If the teams are still equal in the standings, the procedures described in this section shall be applied only to games played on the road by each team against all other teams during the regular season. (road 1-3)

5) If the teams are still equal in the standings, the procedures described in this section shall be applied only to games played at home by each team against all other teams during the regular season. (home 1-3)

6) If the teams are still equal in the standings, the highest position shall be awarded to the team with the fewest team disciplinary points in the League Fair Play table during the regular season.

1. If the teams are still equal in the standings, the highest position in the standings shall be determined by the toss of a coin.
2. The first tiebreaker in a three-way tie is also head-to-head, but it is determined via points-per-game versus the other two teams. If two teams are tied in points-per-game head-to-head, the next tie breaker is goal difference.

NOTE: If two clubs remain tied after another club with the same number of points advances during any step, the tie breaker reverts to step 1 of the two-club format.

For comparison, the EPL's tiebreakers are: GD, then Goals scored.  If teams have the same number of points, the same GD, and scored the same number of goals, then they finish the season tied.  A single table with no playoffs is a bit more elegant, huh?