Hi
The two shelters share the same shape but there are major differences.
The Laser is a double wall tent, the Moment is an hybrid (single wall with a mesh side/door)

As usual the Devil is in the details...
The Laser Photon Elite (as its predecessors) was specifically designed to be the lightest "tent" and for mountain marathon races. Durability and space has been sacrificed for weight savings.

The real weight , minimum, is 2 lbs. That is including the pole sleeve you need to attach to keep it rainproof. Still this is using those 1-2g pegs that in fact most if not all replace with real pegs. So add the weight of your pegs to it. It ships with 12, looks to me that needs at least 8.

Another weight saving is by not having any vents.
Note that the Moment has two bottom end vents as well as two at the apex.
The TN has a listed max headroom at 34", the Moment is 40" high.
The TN has a 10" deep vestibule (about 3' sq) the Moment is 18" deep (a bit over 6')
http://www.moontrail.com/terra-nova-laser-photon-usa.php

Franco