Is >90%VO2max the only thing that matters when doing intervals?

@SpareCycles

My max hr is 198 and my ftp hr around 184-185.
When i do vo2max intervals i aim for 90-95% of max wich is 178-188. Most of time around 186-188. Is this high enough above hr ftp for vo2max?

I did 3x4.5min at 315w. My FTP is 270-275w