Is the Rift's lower screen brightness noticeable? Deciding between Rift or Vive

Very quick. I'm almost decided on buying a Rift, but I have a last doubt..

I read the Rift's screen brightness is 3x lower than the Vive's, and had a friend tell me for that reason the Rift caused less presence. Particularly, he mentioned how being outside in a sunny day in VR it looked much more realistic in the Vive for this reason.

Is this true? Will I really notice the difference? Particularly from those that own both HMD's. Please try to be as unbiased as possible, love u!