as Miu said, your team as a helper doesnt show with equipments+affection included, it just sums up their raw power, besides their lvls are capped at your max lvl girl in all your 4 squads, this is why your helper squad will always display stronger to you than to your allies.

edit: Forgot the total power part, your allies probably have stronger squads with affection included than your squads with affection included, thats why their total power is better than yours, but their helper squads will almost always be weaker than your helper squad cause the game doesnt take into consideration the affection bonus.