both familys had something like 6-7 crews each plus the lupertazzis were plagued by infighting possibly messing the family up
Lupertazzi:
Butchies crew
Santoro crew
Phils crew
Carmine jr crew
Millio crew
Petrille crew
Soprano:
Tony's crew
Junior's crew
Vito's crew
Carlo's crew
Bareses crew
Raymonds crew
Feech's crew (Defunct)
Tony mentions at one point in season 6 that the Lupertazzi's have like 200 buttons, or something along those lines. Although it is safe to assume we weren't exposed to the entire Soprano Crime Family, the Lupertazzi's were clearly a much larger force.