Forgive me if this question has been asked before:

When the Supremes "At their Best" in the UK in February, 1978, this was the track listing:

Side one
1."Stoned Love" [[2:58)
2."I'm Gonna Let My Heart Do the Walking" [[3:08)
3."Floy Joy" [[2:31)
4."Nathan Jones" [[3:01)
5."Everybody's Got the Right to Love" [[2:44)
6."High Energy" [[4:13)
7."Automatically Sunshine" [[3:08)

Side two
1."Up the Ladder to the Roof" [[3:14)
2."You're My Driving Wheel" [[3:19)
3."Bad Weather" [[3:01)
4."Love Train" [[3:20)
5."The Sha-La Bandit" [[3:40)
6."He's My Man" [[3:02)
7."You're What's Missing in My Life" [[3:58)

By the time this was released in the US in June, 1978, the track list was reduced to this:

Side one
1."Stoned Love" [[2:58)
2."I'm Gonna Let My Heart Do the Walking" [[3:08)
3."Floy Joy" [[2:31)
4."Nathan Jones" [[3:01)
5."The Sha-La Bandit" [[3:40)

Side two
1."Up the Ladder to the Roof" [[3:14)
2."You're My Driving Wheel" [[3:19)
3."Everybody's Got the Right to Love" [[2:44)
4."Bad Weather" [[3:01)
5."Love Train" [[3:20)

That's a difference of FOUR tracks. Interestingly, several tracks: "Wonderful Sweet, Sweet Love", "Touch", and "Miss the Man" are missing from both sets, in favor of "unreleased" [[at the time) songs such as "Love Train" and "Sha-la Bandit".