‎I translated below,please correct it more naturally.

このクラスは、他の英会話スクールと違い、先生と生徒という関係性がない。さらに、誰か一人がクラスを進めるのではなく、皆が、クラスがスムーズに進むように、頑張っている。誰一人として同じ指紋を持たないように、このクラスも唯一無二の特徴がある。

unlike other English conversational school,relationship between the teacher and the student is not existed.Moreover,not a certain person but all of members are well devoted to
make class operate smoothly.Like a finger prints that is not allocated to two person、this class is a unique feature.

Sehen Sie eine Übersetzung

I cannot read the Japanese and am editing based on your English translation only, so I apologize if I change the meaning!

"Unlike other conversational English classes, in this class we do not have traditional roles of the "teacher" and "student". Instead, all members are equally devoted to making the class operate smoothly. This feature makes our class unique, the way no two fingerprints are the same."

(The last metaphor of the fingerprints actually sounds quite awkward in English. We use metaphors like that in poetry or prose, but not in simple advertisements. I think it would be more natural to simply say:

This feature makes our class unique.)