Two different groups. Two different debut songs. Two different choreographies. But "La Vie En Rose" by IZ*ONE seems to match the choreography for X1's debut song, "Flash." I'm assuming the BPM is very close because I didn't even have to edit the speed of the song or this video for it to match. Since both groups came from the Produce 101 series, it wouldn't be surprising if the two songs and groups were connected. Take a look for yourself.