Official weights from the manufacturers

Half Dome 2
Fly +Footprint = 3lbs 13oz
average min = 5lbs
average packaged = 5lbs 8 oz
Fly / footprint pitch weight3 lbs. 13 oz. Average minimum weight5 poundsAverage packaged weight5 lbs. 8 oz.

MSR Hubba Hubba
Fly +Footprint = 3lbs
average min = 4lbs
average packaged = 4lbs 8 oz
Fly / footprint pitch weight3 lbs. 13 oz. Average minimum weight5 poundsAverage packaged weight5 lbs. 8 oz.
Fly / footprint pitch weight3 lbs. 13 oz. Average minimum weight5 poundsAverage packaged weight5 lbs. 8 oz.

essentially the same tent room/function wise.