75hz vs 120hz on 70-90fps

[theacenl]

Hi guys,
Im looking for a new monitor but ingame im getting arround 70-90fps.
Is it better to play at 75hz monitor on 75fps or better to have 120hz on 70-90fps fluctuate.

Thanks!

 

[RARRAF]

120hz on 70-90fps fluctuate
https://www.youtube.com/watch?v=PgHx3eMBXjI