You will not see any meaningful difference in picture quality.

The Hasselblad is wonderful to hand hold once you get used to its ergonomy. But the Rolleiflex is even nicer hand held.
The Rolleiflex is very stealth and quiet. The Hasselblad is not.

On a trip, and if I had both kinds of camera, I'd take the Rolleiflex any day of the week due to its smaller weight and how quiet and elegant it is.