I owned both versions of Loop to Loop (Replay and AAB).
The Replay version was a mess and never got it working, but I was able to play the AAB version
and it was a true AAB play game, being able to earn more than one extra ball per ball in play.
Unfortunately both games are now in the custodianship of the Pacific Pinball Museum in Alameda CA.
When I next visit the museum, I will have to check out the potential differences (if any) of the BGs.

Also for some reason I seem to remember that if a player earn some extra balls on his turn, he then had to
plunge and play off those extra ball(s) before the next players turn was resumed.
Could be wrong on that, as my memory ain't great anymore in my old age.

Another good/fun multiplayer AAB game is GTB's Big Top.

This is the reverse side of the BG for the AAB version as posted on IPDB.org
Obviously it is missing the credit window, but does seem to have backlit numbers for up to 7 balls to play.

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Reverse side of the replay version
as posted on pinside topic thread (Loop the Loop Club)

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