I hear the same thing:
- On the exercise page, the female normal voice says всё.
- On the exercise page, the female slow voice says все. (correct)
- On this page, the male normal voice says всё.
By this point I realize it has to be все, but it's still a trap for the unwary.
In the audio -"мы одинаковы", but should be "одинаковые", don't worry if you can or can't hear diference. There are many little things in DUO's audio recordings that are not 100% correct, and not only in this course. I used to report them, now i don't pay attention. Just use other reference sources. Remember nothing is perfect ;-) and some can see or hear that others can't.