Today, the 'Björn & Benny, Agnetha & Anni-Frid' period is largely seen simply as the early days of the Swedish supergroup ABBA. Equally correct would be to think that it was a continuation of the work of 'Björn & Benny', or even that 'B&B,A&A' was a group of its own. The voices of Björn and Benny dominate many tracks and there's little sign of the harmonical interplay of the girls' voices, which would turn out to be perhaps the essence of ABBA. Also, many tracks planned for the second Björn & Benny album were simply recycled for the 'B&B,A&A' album. On the other hand, simple folk ballads typical to 'Björn & Benny' had already become rarer and more adventurous musical styles and elaborate production techniques, typical to ABBA a few years down the line, were already being explored. When exactly 'B&B,A&A' turned into ABBA is a matter of opinion rather than a clear point in time.
'Björn & Benny, Agnetha & Anni-Frid' released four singles (titles depend on territory) and one album. The pre-ABBA era produced one international hit in "Ring Ring".