Returning to Creedence Clearwater Revival, mentioned by
@MuskieCy and
@MeanDean (I can’t seem to multi-quote).
Several CCR 45s were considered double-A-side, esp. during the “Willy and the Poor Boys” and “Cosmo’s Factory” sessions.
I won’t attempt to distinguish here (so I don't risk inaccuracy — that would be embarrassing!) ... A broader picture: Here are singles released July 1969-January 1971.
Each of these included at least one top 10 hit in U.S., and all but the last couplet had a top-5. Dazzling.
Proud Mary / Born on the Bayou
Bad Moon Rising / Lodi
Green River / Commotion
Down on the Corner / Fortunate Son
Who’ll Stop the Rain / Travelin’ Band
Up Around the Bend / Run Through the Jungle
Lookin’ Out My Back Door / Long as I Can See the Light
Have You Ever Seen the Rain / Hey Tonight